DEV Community: Mikasa Ackerman

The Developer SEO Checklist You Actually Need

Mikasa Ackerman — Mon, 09 Mar 2026 15:07:25 +0000

Most developers treat SEO as a marketing problem. But the truth is: the technical foundation of SEO is entirely in our hands. If your site is slow, poorly structured, or missing key metadata, no amount of content marketing will save it.

Here's the SEO checklist I use for every project I ship. No fluff, no theory — just the things that actually move the needle.

1. Meta Tags: Your First Impression on Google

Every page needs three things:

Title tag — under 60 characters, includes primary keyword
Meta description — under 160 characters, compelling enough to click
Canonical URL — tells Google which version of the page is authoritative

<head>
  <title>JSON Formatter - Format & Validate JSON Online | DevToolBox</title>
  <meta name="description" content="Free online JSON formatter and validator. Beautify, minify, and validate JSON data instantly in your browser." />
  <link rel="canonical" href="https://toolbox-dev.com/tools/json-formatter" />
</head>

Getting these right is tedious when you have 50+ pages. I use a meta tag generator to quickly draft all the tags for each page — it outputs the exact HTML you can paste into your <head>.

Common meta tag mistakes

Duplicate titles across pages — Google hates this
Missing descriptions — Google will auto-generate one, usually badly
Title too long — gets truncated in search results with "..."

2. Open Graph Tags: Control Your Social Previews

When someone shares your link on Twitter, LinkedIn, or Slack, Open Graph tags determine what they see. Without them, you get a bare URL. With them, you get a rich card with image, title, and description.

<meta property="og:title" content="JSON Formatter - DevToolBox" />
<meta property="og:description" content="Format and validate JSON online for free" />
<meta property="og:image" content="https://toolbox-dev.com/api/og?tool=json-formatter" />
<meta property="og:url" content="https://toolbox-dev.com/tools/json-formatter" />
<meta property="og:type" content="website" />

Before deploying, always preview how your OG tags will render. An Open Graph preview tool lets you paste a URL and see exactly what the social card will look like — saving you from embarrassing broken previews.

OG image tips

Use 1200x630px for optimal display across platforms
Include your brand name and a clear visual
Dynamic OG images (generated per page) perform better than a single static image

3. URL Structure: Clean Slugs Matter

Your URL is a ranking signal. Clean, descriptive URLs outperform messy ones:

Bad:  /tools/tool?id=12&ref=nav
Good: /tools/json-formatter

Good slug practices:

Lowercase only — URLs are case-sensitive
Hyphens, not underscores — Google treats hyphens as word separators
Descriptive — include the primary keyword
Short — remove stop words (the, a, an, of)

A URL slug generator converts any title into a clean, SEO-friendly slug. Especially useful for blog posts where titles are long and messy.

4. Structured Data: Speak Google's Language

JSON-LD structured data helps Google understand what your page is about. This can unlock rich results (FAQ dropdowns, how-to steps, star ratings) in search.

{
  "@context": "https://schema.org",
  "@type": "SoftwareApplication",
  "name": "JSON Formatter",
  "applicationCategory": "DeveloperApplication",
  "operatingSystem": "Web Browser",
  "offers": {
    "@type": "Offer",
    "price": "0",
    "priceCurrency": "USD"
  }
}

Key schema types for developer tools:

SoftwareApplication — for tools and apps
FAQPage — for FAQ sections (unlocks FAQ rich results)
HowTo — for step-by-step guides
BreadcrumbList — for navigation breadcrumbs

5. Performance: Speed Is a Ranking Factor

Google's Core Web Vitals directly impact rankings:

Metric	Target	What it measures
LCP	< 2.5s	Largest Contentful Paint — loading speed
INP	< 200ms	Interaction to Next Paint — responsiveness
CLS	< 0.1	Cumulative Layout Shift — visual stability

Quick wins:

Static generation — pre-render pages at build time (Next.js SSG)
Image optimization — use WebP/AVIF, lazy load below the fold
Font optimization — font-display: swap, preload critical fonts
Minimize JavaScript — every KB of JS delays interactivity

6. Technical Essentials

The boring stuff that's easy to forget:

Sitemap

<!-- /sitemap.xml -->
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <url>
    <loc>https://toolbox-dev.com/tools/json-formatter</loc>
    <lastmod>2026-03-01</lastmod>
  </url>
</urlset>

Robots.txt

User-agent: *
Allow: /
Sitemap: https://toolbox-dev.com/sitemap.xml

Other must-haves

HTTPS — non-negotiable in 2026
Mobile responsive — Google uses mobile-first indexing
Internal linking — every page should link to related pages
404 page — custom, helpful, with navigation back to useful content

The Complete Checklist

Here's the copy-paste version:

[ ] Title tag (< 60 chars, includes keyword)
[ ] Meta description (< 160 chars, compelling)
[ ] Canonical URL on every page
[ ] Open Graph tags (title, description, image, url)
[ ] Twitter Card meta tags
[ ] Clean URL slugs (lowercase, hyphens, descriptive)
[ ] JSON-LD structured data
[ ] sitemap.xml submitted to Search Console
[ ] robots.txt configured
[ ] HTTPS enabled
[ ] Mobile responsive
[ ] Core Web Vitals passing
[ ] Internal linking between related pages
[ ] Custom 404 page
[ ] Google Search Console verified
[ ] Google Analytics installed

Tools That Help

For the metadata-heavy tasks on this list, having the right tools saves hours. I built DevToolBox partly for this reason — the meta tag generator, OG previewer, and slug generator are tools I use on every project. All 50 tools are free and run in your browser.

Happy ranking!

Working with Data Formats: JSON, CSV, and YAML Explained

Mikasa Ackerman — Mon, 09 Mar 2026 15:03:28 +0000

As developers, we constantly shuttle data between systems. APIs return JSON, spreadsheets export CSV, and config files use YAML. Understanding when to use each format — and how to convert between them — is a fundamental skill.

Let's break down each format, when it shines, and when it doesn't.

JSON: The Universal Language of APIs

JSON (JavaScript Object Notation) is everywhere. Every REST API speaks it. Every programming language can parse it. It's the lingua franca of web development.

{
  "user": {
    "name": "Alice",
    "age": 30,
    "roles": ["admin", "editor"],
    "active": true
  }
}

JSON strengths

Universal support — every language has a JSON parser
Strict syntax — less ambiguity means fewer bugs
Nested structures — perfect for complex, hierarchical data
Native to JavaScript — no conversion needed in browser/Node.js

JSON pain points

No comments — you can't annotate your config files
Verbose — lots of braces and quotes
Trailing commas — adding one breaks everything

When working with JSON daily, a good JSON formatter saves you from squinting at minified API responses. Paste in a blob, get readable output instantly.

CSV: The Spreadsheet Bridge

CSV (Comma-Separated Values) is the oldest and simplest format. It's just rows and columns, separated by commas. Every spreadsheet app can open it, and every database can import it.

name,age,role,active
Alice,30,admin,true
Bob,25,editor,true
Carol,35,viewer,false

CSV strengths

Dead simple — humans can read and write it
Compact — minimal overhead compared to JSON
Universal import — Excel, Google Sheets, databases all accept it
Streaming-friendly — process line by line without loading everything into memory

CSV pain points

No nesting — flat data only
No types — everything is a string
Delimiter hell — commas inside values need quoting, which leads to edge cases
No standard — RFC 4180 exists but many implementations ignore it

When to convert between JSON and CSV

The most common scenario: your API returns JSON, but your stakeholders want a spreadsheet. Or you have a CSV export that needs to feed into a JSON-based system.

A JSON to CSV converter handles this translation. It flattens nested JSON into columns and maps CSV rows back to objects.

YAML: The Human-Friendly Config Format

YAML (YAML Ain't Markup Language) was designed for configuration. It's what you see in Docker Compose files, GitHub Actions, Kubernetes manifests, and Ansible playbooks.

user:
  name: Alice
  age: 30
  roles:
    - admin
    - editor
  active: true

YAML strengths

Readable — the cleanest syntax of the three
Comments — use # to annotate anything
Multi-line strings — built-in support with | and >
Anchors & aliases — reuse values with & and *

YAML pain points

Indentation-sensitive — one wrong space breaks everything
Implicit typing — yes, no, on, off become booleans (the Norway problem)
Security — some parsers execute arbitrary code (always use safe loaders)
Complex spec — YAML 1.2 spec is surprisingly large

YAML ↔ JSON: same data, different clothes

YAML and JSON are actually interchangeable for most use cases. Every valid JSON document is also valid YAML. Converting between them is useful when:

You're debugging a YAML config and want to see the JSON structure
You need to pass YAML config values to a JSON API
You're migrating config formats

A YAML to JSON converter makes these translations instant.

Quick Comparison

Feature	JSON	CSV	YAML
Nesting	Yes	No	Yes
Comments	No	No	Yes
Types	Yes	No	Yes (implicit)
Human-readable	Medium	High	High
Machine-parseable	High	Medium	Medium
Best for	APIs, data exchange	Tabular data, exports	Configuration

Choosing the Right Format

Here's my decision tree:

Building an API? → JSON. No contest.
Exporting data for non-developers? → CSV. They'll open it in Excel.
Writing config files? → YAML. Comments and readability matter for config.
Storing structured data? → JSON if it needs to be machine-processed, YAML if humans will edit it.

The Practical Toolkit

Working with data formats daily means you'll frequently need to:

Pretty-print minified JSON
Convert between JSON and CSV for reports
Translate YAML configs to JSON for debugging

Having these tools bookmarked saves real time. I keep DevToolBox open — it has all three converters plus 47 other developer tools, all free and browser-based.

Happy formatting!

CSS Visual Tools Every Frontend Dev Needs in Their Toolkit

Mikasa Ackerman — Mon, 09 Mar 2026 14:59:55 +0000

Writing CSS by hand is part of every frontend developer's life. But some CSS properties are notoriously hard to visualize — you tweak values, reload, tweak again, reload again. It's a slow feedback loop.

Visual CSS tools solve this by giving you instant preview. Here are three categories of CSS properties where visual tooling makes the biggest difference.

1. Box Shadows: The Most Tweaked Property

Box shadows have 5 parameters: horizontal offset, vertical offset, blur radius, spread radius, and color. Getting the right combination by editing code is painful.

A visual approach works better. You adjust sliders and see the result immediately:

/* A subtle card shadow */
box-shadow: 0px 4px 12px -2px rgba(0, 0, 0, 0.15);

/* An elevated floating effect */
box-shadow: 0px 20px 40px -8px rgba(0, 0, 0, 0.25);

/* Inset shadow for pressed buttons */
box-shadow: inset 0px 2px 4px rgba(0, 0, 0, 0.2);

Each of those took me multiple iterations to get right in code. With a box shadow generator, you drag sliders and copy the final CSS. Time saved: several minutes per shadow.

Pro tip: Layer multiple shadows

Modern designs often stack 2-3 shadows for depth:

box-shadow:
  0px 1px 2px rgba(0, 0, 0, 0.06),
  0px 4px 8px rgba(0, 0, 0, 0.08),
  0px 16px 32px rgba(0, 0, 0, 0.04);

This creates a much more natural, realistic elevation than a single shadow ever could.

2. Gradients: Where Math Meets Art

CSS gradients seem simple until you need them to look good. The difference between a gradient that looks like a PowerPoint slide from 2005 and one that feels modern comes down to:

Color stops — where each color begins and ends
Direction — linear, radial, or conic
Mid-point positioning — the subtle in-between

Here's what separates amateur gradients from professional ones:

/* Bad: harsh transition */
background: linear-gradient(to right, #ff0000, #0000ff);

/* Better: smooth with intermediate stops */
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

/* Best: multiple color stops with careful positioning */
background: linear-gradient(
  135deg,
  #667eea 0%,
  #6c63ff 25%,
  #764ba2 50%,
  #f093fb 100%
);

A gradient generator lets you experiment with these stops visually. You can try radial gradients, conic gradients, and see exactly how the colors blend before committing to code.

Gradient use cases beyond backgrounds

Don't forget gradients work for:

border-image — gradient borders without extra elements
mask-image — fade effects on images and text
text-fill-color with background-clip: text — gradient text

3. CSS Units: The Conversion Problem

Ever needed to convert between px, rem, em, vh, and %? The math isn't hard, but it's tedious and error-prone when you're in the middle of building a responsive layout.

Common conversions you'll need:

From	To	Formula
px	rem	px / root font-size (usually 16)
rem	px	rem × root font-size
px	vw	(px / viewport-width) × 100
px	%	(px / parent-size) × 100

For quick conversions, I keep a CSS units converter bookmarked. Type the value, select the unit, and get instant results — no mental math required.

When to use which unit

rem — font sizes, spacing (scales with user preferences)
em — component-internal spacing that should scale with the component's font size
px — borders, box shadows, very small fixed values
vw/vh — hero sections, full-screen layouts
% — flex children, grid tracks, responsive widths

The Workflow That Works

Here's my typical CSS workflow for a new component:

Shadows: Open a box shadow tool, design the shadow visually, copy the CSS
Colors & gradients: Use a gradient generator for any gradient backgrounds
Spacing: Convert designs from px to rem using a unit converter
Fine-tune: Adjust values in code for the final polish

This workflow might sound like extra steps, but it's actually faster. You spend less time in the guess-and-refresh cycle and more time building.

Wrapping Up

Visual CSS tools aren't a crutch — they're a productivity multiplier. The best frontend developers I know all have a set of bookmarked tools they reach for regularly.

If you want all three tools mentioned above (plus 47 more) in one place, check out DevToolBox — free, no signup, runs entirely in your browser.

Happy styling!

A Developer's Guide to Unix File Permissions (Finally Makes Sense)

Mikasa Ackerman — Mon, 09 Mar 2026 14:56:53 +0000

Every developer hits that moment: you deploy to a server, and suddenly nothing works because of permission errors. You Google "chmod 777" and paste it in. It fixes the problem — and creates ten new ones.

Let's break down Unix file permissions so you actually understand what you're doing.

The Permission Model

Every file and directory in Unix has three permission groups:

Owner (u) — the user who owns the file
Group (g) — users in the file's group
Others (o) — everyone else

Each group gets three permission types:

Read (r) — view file contents or list directory
Write (w) — modify file or create/delete files in directory
Execute (x) — run file as program or access directory

Reading `ls -l` Output

When you run ls -l, you see something like:

-rwxr-xr-- 1 deploy www-data 4096 Mar 9 config.yml

That first column breaks down as:

-  rwx  r-x  r--
│  │    │    │
│  │    │    └── Others: read only
│  │    └─────── Group: read + execute
│  └──────────── Owner: read + write + execute
└─────────────── File type (- = file, d = directory)

The Octal System

Each permission has a numeric value:

Read = 4
Write = 2
Execute = 1

Add them up for each group. So rwxr-xr-- becomes:

Owner: 4+2+1 = 7
Group: 4+0+1 = 5
Others: 4+0+0 = 4

Result: 754

Instead of memorizing the math, use a chmod calculator — check the boxes for the permissions you want, and it gives you the numeric code instantly. It also works in reverse: enter a number and see what permissions it represents.

Common Permission Patterns

Octal	Symbolic	Use Case
755	rwxr-xr-x	Executables, public directories
644	rw-r--r--	Config files, HTML/CSS/JS
700	rwx------	Private scripts, SSH directory
600	rw-------	SSH keys, secrets
775	rwxrwxr-x	Shared group directories
666	rw-rw-rw-	Temp files (avoid in production)
777	rwxrwxrwx	Never use this in production

Why chmod 777 Is Dangerous

chmod 777 means "anyone can read, write, and execute this file." On a web server, that means:

Any process can modify your config files
Uploaded scripts can be executed
Other users on shared hosting can access your data

Instead, figure out the minimum permissions needed. A web server serving static files usually needs 644 for files and 755 for directories.

The chmod Command

# Numeric (octal) mode
chmod 755 script.sh

# Symbolic mode — more readable
chmod u+x script.sh        # Add execute for owner
chmod g-w config.yml        # Remove write for group
chmod o= secrets.env        # Remove all permissions for others
chmod a+r public.html       # Add read for all (a = all)

# Recursive — apply to all files in directory
chmod -R 644 /var/www/html/

Understanding Number Bases

The octal permission system uses base-8 numbers. If you've ever been confused about why permissions use 0-7 instead of 0-9, it's because three binary bits (representing r, w, x) map perfectly to one octal digit:

Binary  Octal  Permissions
000     0      ---
001     1      --x
010     2      -w-
011     3      -wx
100     4      r--
101     5      r-x
110     6      rw-
111     7      rwx

A number base converter helps you visualize these conversions between binary, octal, decimal, and hex — useful for understanding not just permissions but also networking, memory addresses, and color codes.

Special Permissions

Beyond the basic rwx, there are three special bits:

Setuid (4xxx) — File executes as the file owner, not the user running it.

chmod 4755 /usr/bin/passwd  # Runs as root even when called by a regular user

Setgid (2xxx) — File executes as the group owner. On directories, new files inherit the directory's group.

chmod 2775 /shared/project/  # New files get the project group

Sticky bit (1xxx) — On directories, only the file owner can delete their files.

chmod 1777 /tmp/  # Everyone can write, but only delete their own files

Quick Debugging Checklist

When you hit permission errors:

Check current permissions: ls -la filename
Check file ownership: ls -la filename (columns 3 and 4)
Check your user/groups: id or whoami and groups
Check parent directories: You need execute permission on every directory in the path
Use the calculator: Don't guess — use a chmod calculator to set exact permissions

Wrapping Up

File permissions aren't complicated once you understand the three groups and three types. The key is to always use the minimum permissions needed rather than reaching for 777.

Bookmark a chmod calculator for quick reference, and check out DevToolBox for more free browser-based developer tools including a number base converter and 48 other utilities.

5 Ways to Debug JWT Tokens (Without Losing Your Mind)

Mikasa Ackerman — Mon, 09 Mar 2026 14:51:58 +0000

JSON Web Tokens are everywhere — authentication, API authorization, session management. But when something goes wrong with a JWT, debugging can feel like staring at a wall of Base64 gibberish.

Here are 5 practical ways to debug JWT issues quickly and get back to shipping code.

1. Decode the Token First

Before anything else, look at what's actually inside the token. A JWT has three parts separated by dots: header, payload, and signature. The header and payload are just Base64URL-encoded JSON.

You can decode them instantly with a free JWT decoder — paste the token in, and you'll see the parsed header (algorithm, type) and payload (claims like sub, exp, iat) in plain JSON.

This alone solves most debugging sessions. You can immediately check:

Is exp in the past? Your token expired.
Is iss pointing to the wrong issuer?
Are the expected claims actually present?

2. Check the Expiration Timestamp

The most common JWT bug is an expired token. The exp claim is a Unix timestamp — not a human-readable date. When you see "exp": 1709942400, do you know if that's in the past?

Use a timestamp converter to quickly translate Unix timestamps to human-readable dates. Or check it in your JWT decoder output — good tools show the decoded time automatically.

Pro tip: Also check the iat (issued at) and nbf (not before) claims. If your server clock is slightly off from the auth server, tokens might be rejected even if they look valid.

3. Verify the Signature Locally

A JWT can look perfectly valid but have a bad signature. This happens when:

The signing key was rotated
You're using the wrong key or secret
The token was tampered with
There's an algorithm mismatch (RS256 vs HS256)

To test this, use a JWT generator to create a token with the same payload but your own secret, then compare. If your application rejects valid-looking tokens, the issue is almost always in the signature verification step.

Check the alg field in the header. If your server expects RS256 but the token says HS256, you've found your bug.

4. Inspect the Network Request

Sometimes the JWT itself is fine — it's the way it's being sent that's broken. Open your browser DevTools and check:

Authorization header format: Should be Bearer <token>, not JWT <token> or just the raw token
Cookie settings: If using HTTP-only cookies, check SameSite, Secure, and Domain attributes
CORS issues: The Authorization header requires proper CORS configuration
Token truncation: Some tools or logs truncate long strings — make sure the full token is being sent

// Quick check in browser console
fetch('/api/protected', {
  headers: {
    'Authorization': `Bearer ${localStorage.getItem('token')}`
  }
}).then(r => console.log(r.status, r.headers.get('www-authenticate')));

The WWW-Authenticate response header often contains the specific error (e.g., invalid_token, insufficient_scope).

5. Compare Tokens Side by Side

When a working endpoint suddenly breaks, compare a known-good token with the failing one. Decode both and diff them.

Look for:

Missing claims the server expects
Different aud (audience) values — common when switching between environments
Role or permission changes in custom claims
Different issuers — staging vs. production auth servers

A simple side-by-side comparison in a JWT decoder often reveals the difference in seconds.

Bonus: Common JWT Gotchas

Clock skew: Auth servers and application servers with different times cause intermittent failures. Most JWT libraries support a clockTolerance option.
Token size: JWTs go in HTTP headers. If your token has too many claims, it can exceed header size limits (usually 8KB). Keep payloads lean.
Refresh token confusion: Don't send your refresh token where an access token is expected. They look similar but serve different purposes.
Base64 vs Base64URL: JWT uses Base64URL encoding (no padding, - and _ instead of + and /). Using standard Base64 decode will produce garbled output.

Wrapping Up

JWT debugging follows a simple pattern: decode → check claims → verify signature → inspect transport. Having the right tools bookmarked saves you from writing throwaway scripts every time.

If you work with JWTs regularly, check out DevToolBox — it has a JWT decoder, JWT generator, and 48 other browser-based dev tools. Everything runs locally, no data leaves your browser.

Happy debugging!

I Built 50 Free Browser-Based Developer Tools - No Signup, No Server Calls

Mikasa Ackerman — Sun, 08 Mar 2026 16:20:34 +0000

Every developer has that moment: you need to decode a JWT, format some JSON, or convert a timestamp — and you end up on a sketchy site plastered with ads that may or may not be uploading your data to a server in who-knows-where.

I got tired of it, so I built DevToolBox — a collection of 50 free, browser-based developer tools. No signup, no server calls, no tracking. Everything runs in your browser using plain JavaScript.

What's Inside

Here's a quick overview of the tool categories:

Formatters & Validators

JSON Formatter & Validator — Pretty-print, minify, and validate JSON with syntax highlighting
HTML Formatter — Beautify messy HTML
SQL Formatter — Format SQL queries with keyword uppercasing
XML Formatter — Indent and validate XML
CSS & JavaScript Minifiers

Encoders & Decoders

Base64 Encode/Decode — Text and file encoding
URL Encode/Decode — Handle special characters in URLs
JWT Decoder — Inspect JWT headers, payloads, and expiry
HTML Entity Encoder — Named, numeric, and hex entities
Image to Base64, Text to Binary, and more

Generators

UUID Generator — v4 UUIDs with bulk generation
Password Generator — Cryptographically secure passwords with strength indicator
Lorem Ipsum Generator — Placeholder text by words, sentences, or paragraphs
QR Code Generator — Pure JS QR encoder with SVG/PNG download
Placeholder Image Generator, Favicon Generator, and more

Converters

Timestamp Converter — Unix epoch to human-readable and back
YAML to JSON — Bidirectional conversion
JSON to CSV — RFC 4180 compliant
JSON to TypeScript — Generate TS interfaces from JSON
Color Converter, CSS Units Converter, Number Base Converter, Data Size Converter, Time Zone Converter

CSS Visual Tools

Box Shadow Generator — Visual editor with multi-layer support
Gradient Generator — Linear and radial gradients with color stops
CSS Units Converter

Text & Code Tools

Regex Tester — Real-time matching with flag support
Diff Checker — Side-by-side text comparison using LCS algorithm
Markdown Preview — Live preview with pure JS parser
Word Counter, String Case Converter, Line Sorter, and more

Reference Tools

HTTP Status Codes — Searchable reference for all 44 status codes
Cron Expression Parser — Parse cron + show next execution times
Chmod Calculator — Interactive permission grid with presets
ASCII Table — Searchable reference (0-255)

Why Browser-Based Matters

Every tool on DevToolBox processes data entirely in your browser. Here's why that matters:

Privacy — Your API keys, JWTs, passwords, and config files never leave your machine. There's no server to get breached.
Speed — No network round-trip. Paste your data, get results instantly.
Offline capable — After the initial page load, most tools work without an internet connection.
No rate limits — Format a million JSON objects if you want. It's your CPU.

Tech Stack

For the curious:

Next.js with static site generation (59 pages pre-rendered at build time)
Tailwind CSS + shadcn/ui for the UI
Dark mode with system preference detection
Zero external API dependencies — every tool is pure JavaScript
Deployed on Vercel (free tier handles it easily)

What's Next

I'm planning to keep adding tools based on what developers actually need. If you have suggestions for tools you'd like to see, drop a comment below.

Check it out: toolbox-dev.com

All tools are free forever. No signup required. No data collection. Just open and use.

DEV Community: Mikasa Ackerman

The Developer SEO Checklist You Actually Need

1. Meta Tags: Your First Impression on Google

Common meta tag mistakes

2. Open Graph Tags: Control Your Social Previews

OG image tips

3. URL Structure: Clean Slugs Matter

4. Structured Data: Speak Google's Language

5. Performance: Speed Is a Ranking Factor

6. Technical Essentials

Sitemap

Robots.txt

Other must-haves

The Complete Checklist

Tools That Help

Working with Data Formats: JSON, CSV, and YAML Explained

JSON: The Universal Language of APIs

JSON strengths

JSON pain points

CSV: The Spreadsheet Bridge

CSV strengths

CSV pain points

When to convert between JSON and CSV

YAML: The Human-Friendly Config Format

YAML strengths

YAML pain points

YAML ↔ JSON: same data, different clothes

Quick Comparison

Choosing the Right Format

The Practical Toolkit

CSS Visual Tools Every Frontend Dev Needs in Their Toolkit

1. Box Shadows: The Most Tweaked Property

Pro tip: Layer multiple shadows

2. Gradients: Where Math Meets Art

Gradient use cases beyond backgrounds

3. CSS Units: The Conversion Problem

When to use which unit

The Workflow That Works

Wrapping Up

A Developer's Guide to Unix File Permissions (Finally Makes Sense)

The Permission Model

Reading ls -l Output

The Octal System

Common Permission Patterns

Why chmod 777 Is Dangerous

The chmod Command

Understanding Number Bases

Special Permissions

Quick Debugging Checklist

Wrapping Up

5 Ways to Debug JWT Tokens (Without Losing Your Mind)

1. Decode the Token First

2. Check the Expiration Timestamp

3. Verify the Signature Locally

4. Inspect the Network Request

5. Compare Tokens Side by Side

Bonus: Common JWT Gotchas

Wrapping Up

I Built 50 Free Browser-Based Developer Tools - No Signup, No Server Calls

What's Inside

Why Browser-Based Matters

Tech Stack

What's Next

Reading `ls -l` Output