Developer tools

Small developer utilities that run locally.

These pages are for payload cleanup, encoding, and identifiers you need in a hurry.

Invalid JSON and bad encodings surface as readable errors instead of a silent fail.

JSON FormatterPretty-print JSON with a chosen indent so API payloads are readable. Formatting runs in your browser and never leaves this tab.
JSON ValidatorCheck whether JSON is syntactically valid and see the line and column of the first error. Validation stays in your browser.
JSON MinifierMinify JSON by stripping extra whitespace to shrink request payloads. Compression of the text happens locally in this tab.
JSON to CSVConvert a JSON object or array of objects into CSV for spreadsheets. Nested keys flatten with dots, all inside your browser.
Base64 EncoderEncode UTF-8 text to Base64 for data URIs, headers, and embeds. Encoding uses the Web APIs in this tab, with no server hop.
Base64 DecoderDecode Base64 back into readable UTF-8 text so you can inspect tokens and payloads. Decoding never leaves this browser tab.
URL EncoderPercent-encode query values and path segments with encodeURIComponent. Spaces become %20. Encoding stays in your browser.
URL DecoderDecode percent-encoded URLs and query strings back to readable text. Invalid sequences are flagged without a network call.
UUID GeneratorGenerate UUID version 4 values with the Web Crypto API. Create up to 500 identifiers at once, then copy or download the list.
Unix Timestamp ConverterConvert Unix time in seconds or milliseconds to a calendar date, and the other way around. Conversion runs locally in the browser.