15 Essential Online Tools Every Developer Should Bookmark

Tools That Save You Time Every Day

As developers, we spend a surprising amount of time on small utility tasks: formatting data, converting between formats, testing patterns, generating test data. Here are 15 tools you should bookmark today.

1. JSON Formatter

Use case: Making API responses readable
Try it →

2. Regex Tester

Use case: Building and debugging regular expressions with live feedback
Try it →

3. Base64 Encoder/Decoder

Use case: Encoding data for URLs, emails, or API payloads
Try it →

4. JWT Decoder

Use case: Inspecting token claims without server roundtrips
Try it →

5. Password Generator

Use case: Creating strong, random passwords for services and databases
Try it →

6. Unix Timestamp Converter

Use case: Converting between human-readable dates and epoch time
Try it →

7. URL Encoder/Decoder

Use case: Properly encoding query parameters and path segments
Try it →

8. Hash Generator

Use case: Generating MD5, SHA-256 checksums for verification
Try it →

9. Color Converter

Use case: Converting between HEX, RGB, and HSL formats
Try it →

10. CSS Gradient Generator

Use case: Creating gradients visually instead of guessing values
Try it →

11. QR Code Generator

Use case: Quickly generating QR codes for URLs and text
Try it →

12. Cron Expression Parser

Use case: Understanding complex cron schedules
Try it →

13. SQL Formatter

Use case: Making complex queries readable
Try it →

14. JSON to TypeScript

Use case: Auto-generating type definitions from API responses
Try it →

15. UUID Generator

Use case: Generating unique identifiers for testing
Try it →

Bookmark the Collection

All 45+ tools are available at ToolboxRun — free, no signup, and privacy-first.