16 Free Developer Tools Worth Bookmarking for Quick Web Tasks

Useful Web Finds — Wed, 08 Jul 2026 12:20:50 +0000

Developers often need small utilities during daily work.

Sometimes you just need to format XML, convert CSV to JSON, decode a JWT, test a regex, compare two text blocks, parse a cron expression, minify HTML or JavaScript, or generate a quick secret key.

These tasks are small, but they can interrupt your workflow if you have to search for a different tool every time.

Extractly has a Developer Tools section with multiple browser-based utilities for quick development tasks. I went through the section and picked 16 tools that are useful to bookmark.

Developer tools:

Developer tools - Extractly | Extractly

Decode JWTs, test regex patterns, compare text, parse cron expressions, generate secrets, format JSON, convert CSV/XML, and minify HTML or JavaScript snippets.

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1. JSON Key Sorter

Sort JSON object keys alphabetically for cleaner diffs and easier review.

Useful when you want a stable JSON structure before committing, comparing, or sharing configuration data.

Open JSON Key Sorter

2. CSV to JSON Converter

Convert CSV rows into formatted JSON objects locally.

Useful when working with exports, spreadsheets, mock data, or quick API payload examples.

Open CSV to JSON Converter

3. JSON to CSV Converter

Convert JSON objects or arrays into CSV.

Useful when you need to move structured data into a spreadsheet or share it with non-technical users.

Open JSON to CSV Converter

4. XML Formatter

Format compact XML with readable indentation.

Useful for config files, API responses, feeds, and XML snippets that are hard to read in one line.

Open XML Formatter

5. XML Validator

Check whether XML tags appear balanced and properly nested.

Useful before sending XML to an API or debugging a broken XML document.

Open XML Validator

6. JWT Decoder

Decode a JWT header and payload locally without verifying or sending the token anywhere.

Useful when debugging authentication flows, inspecting claims, or checking token expiry.

Open JWT Decoder

7. Regex Tester

Test a regular expression against sample text and inspect matches.

Useful when writing validation rules, search patterns, filters, or text extraction logic.

Open Regex Tester

8. Text Diff Checker

Compare two text blocks line by line and summarize added or removed lines.

Useful for checking config changes, snippets, logs, or generated output.

Open Text Diff Checker

9. Cron Expression Parser

Parse a five-field cron expression into minute, hour, day, month, and weekday fields.

Useful when checking scheduled jobs, deployment tasks, background workers, or automation rules.

Open Cron Expression Parser

10. HTML Minifier

Remove comments and extra spacing from HTML snippets.

Useful for quick cleanup before embedding or testing small HTML blocks.

Open HTML Minifier

11. JavaScript Minifier

Remove comments and extra whitespace from small JavaScript snippets.

Useful for quick testing, embeds, and lightweight script cleanup.

Open JavaScript Minifier

12. Secret Key Generator

Generate cryptographically secure Base64 or URL-safe secrets locally in the browser.

Useful for app secrets, session keys, test credentials, and internal tooling.

Open Secret Key Generator

13. Password Generator

Generate strong passwords with adjustable length, numbers, symbols, and readable character options.

Useful when creating temporary accounts, test users, or secure internal passwords.

Open Password Generator

14. API Token Generator

Create URL-safe bearer tokens with optional prefixes.

Useful for development, testing, internal tools, and mock authentication flows.

Open API Token Generator

15. Random Hex Generator

Generate secure random hexadecimal strings for nonces, salts, IDs, and configuration values.

Useful when you need quick random values during development.

Open Random Hex Generator

16. .env Secret Generator

Generate ready-to-copy environment variable lines for app secrets and session keys.

Useful when setting up a new project, local environment, or test configuration.

Open .env Secret Generator

Final thoughts

Small developer tools do not need to be complicated.

For quick formatting, conversion, validation, token inspection, diff checking, and secret generation, browser-based utilities can save time without opening a full IDE plugin or installing another package.

Explore all Extractly developer tools

DEV Community: Useful Web Finds