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Davron Yuldashev
Davron Yuldashev

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I Built 6 Free Browser-Based Tools — 50+ Utilities, No Signup, No Tracking

#javascript #webdev #productivity

All tools are free. Processing happens in your browser or on a private server. No accounts, no ads, no tracking.

Over the past 6 weeks I built a portfolio of free online utility tools at davrapps.dev. Here's what shipped and how it's built.

The Apps

🛠️ DevTools — 28 Developer Utilities

Every tool runs 100% client-side — nothing is sent to any server. Check the Network tab if you don't believe me.

Text & Data

  • JSON Formatter & Validator
  • YAML ↔ JSON Converter
  • TOML ↔ JSON Converter
  • Diff Checker — compare two texts side-by-side
  • Text Statistics — word count, reading time, character frequency
  • String Case Converter — camelCase, snake_case, SCREAMING_SNAKE, kebab-case
  • Lorem Ipsum Generator

Encoding & Crypto

  • Base64 Encode/Decode
  • URL Encoder/Decoder
  • HTML Entity Encoder/Decoder
  • Hash Generator — MD5, SHA-1, SHA-256, SHA-512 (Web Crypto API)
  • JWT Decoder — inspect header + payload without a secret
  • Password Generator — cryptographically secure
  • Image to Base64

Dev Helpers

  • Regex Tester — real-time matching with group highlighting
  • UUID Generator — bulk v4 UUIDs
  • Unix Timestamp Converter — epoch ↔ human-readable with timezone
  • Number Base Converter — binary, octal, decimal, hex
  • Cron Expression Parser — plain English explanations
  • SQL Formatter
  • CSS Minifier
  • Markdown Preview
  • Color Converter — HEX ↔ RGB ↔ HSL
  • CSS Gradient Generator — linear/radial/conic, CSS + Tailwind output
  • Tailwind CSS Color Explorer

👉 devtools.davrapps.dev

🖼️ ImgTools — 7 Image Utilities

Server-side processing with Sharp/libvips on a private VPS — files are never stored.

  • Compress — MozJPEG, up to 80% size reduction
  • Resize — custom dimensions + social media presets
  • Crop & Rotate
  • Format Convert — JPEG, PNG, WebP, AVIF, GIF, TIFF
  • Watermark — text or image
  • Background Removal

👉 imgtools.davrapps.dev

📄 PDFKit — 9 PDF Tools

No file size limits. No watermarks on output. No account needed.

Merge, Split, Compress, Rotate, PDF ↔ Image, Password Protect, Watermark, Add Page Numbers.

👉 pdfkit.davrapps.dev

🔲 QRKit — 8 QR Code Tools

Generate (with logo + custom colors), Scan (file or camera), WiFi QR, vCard QR, Batch Generator, Decode, Color Picker.

👉 qrkit.davrapps.dev

📸 Picefy — Screenshot Beautifier

Turn plain screenshots into polished visuals: gradient backgrounds, rounded corners, drop shadow, device frames. Export as PNG.

👉 picefy.davrapps.dev

📦 ShipKit — Next.js + Bun SaaS Boilerplate ($49)

Full-stack starter: Next.js 16, Bun, Elysia.js, Better Auth, Polar.sh payments, PostgreSQL + Drizzle ORM, shadcn/ui, i18n, dark mode.

👉 shipkit.davrapps.dev

Monetization

App Free limit Pro
DevTools Unlimited —
ImgTools 5 ops/day $3/mo
PDFKit 5 ops/day $5/mo
QRKit 5 ops/day Coming soon
Picefy 5 exports/day $5/mo
ShipKit — $49 one-time

Payments via Polar.sh (Stripe under the hood, but with a much better OSS-friendly DX).

Tech Stack

All apps share the same foundation:

  • Next.js 16 (App Router, SSG for all tool pages)
  • Bun runtime + package manager
  • Elysia.js API layer (Bun-native, ~3x faster than Express in benchmarks)
  • Better Auth — email/password + OAuth, sessions in PostgreSQL
  • shadcn/ui + Tailwind CSS — every app has dark/light mode
  • PostgreSQL + Drizzle ORM
  • i18n via next-intl (EN/RU/UZ)

Deployed on a Hetzner CAX21 ARM (~$8/mo total for all 6 apps). Each app is a systemd service behind nginx, its own port pair.

Key Decisions

Client-side by default. For anything that doesn't need a server (formatters, converters, hash generators), everything stays in the browser. Zero upload risk, zero server cost.

SEO-first architecture. Each tool has its own URL, unique meta tags, FAQ with JSON-LD structured data. devtools.davrapps.dev/en/json-formatter and devtools.davrapps.dev/en/uuid-generator each target different search queries rather than competing as a single page.

One server, many apps. Rather than pay per-app VPS costs, everything runs on one ARM machine. Total infra cost for 6 apps + 14 services: ~$8/mo.

Current Status

  • 6 apps live, 50+ total tools
  • MRR: $5 (early days)
  • Backlinks: 2 merged awesome-list PRs, 7 more open
  • Starting to appear in Brave/Bing — Google indexation in progress

What tools do you wish existed? Drop a comment — I might build it next.

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