Collection of free, browser-based developer tools. No sign-up, no server, your data stays in your browser.
Live: https://tlyyxjz.github.io/free-dev-tools/
| Tool | Description | Link |
|---|---|---|
| JSON Formatter | Beautify, minify, validate JSON | json_formatter.html |
| Base64 Encoder/Decoder | Encode/decode Base64 with UTF-8 support | base64_tool.html |
| CSV to JSON Converter | Convert CSV to JSON with nested objects | csv_to_json.html |
| CSV Cleaner | Remove duplicates, trim whitespace | csv-cleaner-free |
- 100% client-side processing
- No data collection
- No sign-up required
- Mobile responsive
- SEO optimized
- CSV Sweeper Pro - Advanced CSV cleaning ($9+)
- PromptVault - AI prompt manager ($15)
- CS Student OS - Notion for CS students ($12+)
MIT