Inspect API payloads
Validate and format JSON or convert structured configuration between JSON and YAML.
Structured data and encoding
Free developer tools
Format, inspect, compare, encode, decode, and convert structured, tabular, text, encoded, and timestamp data directly in your browser.
8 focused toolsNo signup requiredFree to use
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Browse developer tools
Choose a focused utility to open its controls, instructions, and related workflows.
JSON FormatterValidate, beautify, sort, inspect, minify, copy, and download JSON locally.→JSON ↔ CSV ConverterConvert JSON object arrays to quoted CSV or parse CSV records into formatted JSON.→Text Diff CheckerCompare two text versions with line and word highlights, then copy or download the diff.→Base64 Encoder & DecoderEncode Unicode text and files or decode Base64 into text and binary bytes.→URL Encoder & DecoderPercent-encode or decode URLs and components, then inspect query parameters.→JWT Decoder & InspectorDecode colored JWT header and payload JSON and inspect standard claims.→YAML ↔ JSON ConverterConvert YAML to formatted JSON or JSON to readable YAML with validation.→Unix Timestamp ConverterConvert epoch seconds or milliseconds to readable dates and back again.→
Common workflows
What these tools help you do
Move between rows and objects
Convert JSON object arrays to properly quoted CSV or parse tabular records into formatted JSON.
Review text changes
Compare original and revised text with line alignment, word highlights, and a portable unified diff.
Debug tokens and URLs
Read JWT headers and claims or inspect encoded URL components and query parameters.
Move encoded data safely
Encode Unicode text and files as Base64 or decode validated data back into bytes.
Translate machine time
Convert Unix seconds or milliseconds to readable dates and calendar values back to epoch time.
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