Tools
Free tools for everyday developer work.
Format data, inspect tokens, convert values, and test small pieces of a workflow without leaving your browser.
Developer essentials
Choose a tool and get to the useful part.
JSON Formatter
Turn compact or difficult-to-read JSON into clean, indented JSON you can inspect and copy.
Open toolJSON Validator
Check whether JSON is valid and get a readable error message when the structure is not.
Open toolJSON Minifier
Remove unnecessary JSON whitespace while keeping the data valid and ready for transport.
Open toolJWT Decoder
Inspect the header and payload of a JSON Web Token locally without verifying its signature.
Open toolBase64 Encoder
Encode text as Base64 in your browser for quick debugging, testing, and data exchange tasks.
Open toolBase64 Decoder
Decode Base64 text locally and inspect the original readable value without uploading it.
Open toolURL Encoder
Encode query values and URL fragments safely for links, APIs, and browser requests.
Open toolURL Decoder
Decode percent-encoded URLs and query values into text that is easier to inspect.
Open toolUUID Generator
Generate unique UUID v4 values for tests, records, prototypes, and development workflows.
Open toolTimestamp Converter
Convert Unix timestamps and readable dates to compare logs, API values, and event times.
Open toolQuick feedback
Each tool gives you a clear result or a useful error message so you can keep moving.
Private by default
Tool inputs are processed in your browser. Avoid pasting secrets into any online service, including this one.
Keep your set
Save useful tools or revisit recent ones from My Toolkit on the same browser.