Tool Atlas Developer tools
Use developer-focused utilities for encoding and text transformations.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to readable text.
Hash Generator
Compute SHA-256, SHA-384, or SHA-512 hashes from text or files in your browser.
Text Diff
Compare two text snippets side by side and see added, removed, and unchanged lines.
Regex Tester
Test regular expressions against sample text and see matches with capture groups.
JSON Formatter & Validator
Format, minify, and validate JSON instantly with readable output.
URL Encoder / Decoder
Encode URL components or decode encoded strings in one click.
Color Picker & Converter
Pick a color or paste HEX, RGB, or HSL values and convert between formats with contrast ratio checking.
Favicon Generator
Upload an image and generate favicons in all standard sizes. Download as a ZIP with an ICO file and HTML snippet.
How these tools work
- Choose a tool that matches your task.
- Provide your input and configure options.
- Run the tool and download or copy the result.
Category FAQ
Can I use these tools on mobile?
Yes, all category pages and tools are built to be mobile-friendly.
Are outputs suitable for production tasks?
Outputs are designed for practical use, but always verify critical files.