Free Online Developer Tools — 25tools
25tools gives developers instant access to 10 free online tools — no sign-up, no install, no limits. From JSON formatting and JWT decoding to UUID generation and regex testing, every tool runs directly in your browser so your data never leaves your device.
- JSON FormatterFree
Format and validate JSON instantly
DeveloperOpen → - Regex TesterFree
Test regex patterns with live highlighting
DeveloperOpen → - Base64 EncoderFree
Encode and decode Base64 strings
DeveloperOpen → - URL EncoderFree
Encode and decode URLs safely
DeveloperOpen → - JWT ReaderFree
Decode and inspect JWT tokens instantly
DeveloperOpen → - Color PickerFree
Pick colors and convert between formats
DeveloperOpen → - UUID GeneratorFree
Generate random UUID v4 strings in bulk
DeveloperOpen → - Timestamp ConverterFree
Convert Unix timestamps to human readable dates
DeveloperOpen → - CSS MinifierFree
Minify and beautify CSS instantly
DeveloperOpen → - Markdown to HTMLFree
Convert Markdown to HTML with live preview
DeveloperOpen → - Password GeneratorFree
Generate strong random passwords instantly
DeveloperOpen →