Home/Developer Tools
Developer Utilities

Free Developer Tools

Fast local utilities for formatting, encoding, decoding, validating, hashing, testing, and generating common developer outputs.

{} JSON Formatter

Format, validate, minify and download JSON.

{ } Base64 Encoder / Decoder

Encode and decode Base64 text locally.

🔗 URL Encoder / Decoder

Encode and decode URLs and URI components.

# Hash Generator

Generate SHA hashes and checksums from text.

.* Regex Tester

Test regex patterns and replacement previews.

⏲️ Cron Expression Builder

Build and explain cron expressions.

🔑 JWT Decoder

Decode JWT header, payload and common claims locally.

< HTML Entity Encoder

Encode and decode HTML entities safely.

🌈 CSS Gradient Generator

Create CSS gradients with live previews.

Developer workflow

  1. Use JSON Formatter to validate API responses.
  2. Use URL or Base64 tools to prepare encoded data.
  3. Use Regex Tester before adding a pattern to your project.
  4. Use JWT Decoder only for inspection, not for storing secrets.

Best developer tools

JSON Formatter, Regex Tester and JWT Decoder are the most useful starting points.

Developer tools FAQ

Do these tools upload my code?

Most actions run locally in your browser. Avoid pasting private secrets into any online tool.

Can I use outputs in production?

Yes, but always review generated output before using it in production projects.

Are these developer tools free?

Yes. They are free and no account is required.

Which tool should I use first?

Start with JSON Formatter for API work, then Regex Tester and URL Encoder for debugging text and links.