JSON Formatter & Validator
Validate and format JSON with clear error feedback.
Paste JSON and run validation or auto-format operations.
Free Developer Tools
The Developer Tools category includes production-style utilities for daily engineering tasks, all executed locally in the browser for privacy.
All tools run entirely in your browser. No data is uploaded to any server.
Base64 Encode/Decode
Encode text to Base64 and decode Base64 back to text.
Input text in either mode and convert instantly.
UUID Generator
Generate one or many UUID v4 values in one click.
Set quantity and create UUID values ready for copy.
JWT Decoder
Decode JWT header and payload client-side.
Paste JWT token and inspect decoded JSON parts.
URL Encoder/Decoder
Encode and decode URL components safely.
Paste text or URL component and run encode/decode instantly.
Hash Generator (SHA256 / MD5)
Generate SHA256 and MD5 hashes for text input.
Enter content, choose algorithm, and compute hash immediately.
FAQ
Are developer tools secure?
Yes. Input data is processed locally in your browser.
Do tools support large inputs?
Yes. Tools are implemented to handle large text blocks efficiently.
Are external APIs used?
No. All logic runs client-side without external APIs.
Are outputs reliable?
Yes. Utilities use standard algorithms and browser-native capabilities.
Are tools free to use?
Yes. All tools in this category are free.