Web & Dev
JSON/XML formatters, URL tools, regex testers, and HTTP utilities.
43 tools available
Web & Dev tools are the small, sharp utilities developers reach for dozens of times a day: JSON and XML formatters, a regex tester, URL parser and encoder, JWT decoder, diff viewer, hash and UUID generators, and minifiers. Each does one job well and instantly, with no install, no sign-in, and no data leaving the tab.
The shared theme is structured text. Most web work involves moving data between JSON, XML, YAML, and CSV, and these tools validate, pretty-print, convert, and compare those formats so malformed payloads surface immediately instead of three layers deep in an API call. Because everything runs client-side, you can safely paste a production token into the JWT decoder or a customer record into the JSON formatter — it is processed in your browser and discarded when you close the tab.
Data format comparison
The structured-data formats these tools parse and convert between.
| Format | Readability | Comments | Schema | Common use |
|---|---|---|---|---|
JSON | High | No | JSON Schema | APIs, config, web apps |
XML | Medium | Yes | XSD/DTD | Documents, SOAP, RSS |
YAML | Very high | Yes | JSON Schema | CI configs, infra-as-code |
CSV | High (tabular) | No | None | Spreadsheets, data export |
TOML | High | Yes | None | App config (Rust, Python) |
JSON is the web’s default interchange format; YAML and TOML trade strictness for human-friendliness in config files.