JSON to CSV
Builds CSV columns from the union of object keys, preserving first-seen order.
Developer tools17 free tools
Developer tools
Less busywork between you and your next commit.
All processing happens on your device.
JSON Flattener
Converts nested JSON leaves into JSON Pointer paths.
Developer toolsJSON to JSON Lines
Serializes each element of a JSON array as one independent compact JSON line.
Developer toolsJSON Lines to JSON
Parses each nonblank line separately and collects the records into one JSON array.
Developer toolsJSON Formatter
Parses strict JSON and serializes with two-space indentation.
Developer toolsJSON Validator
Uses the browser’s strict JSON parser.
Developer toolsJSON Minifier
Parses strict JSON and removes insignificant formatting whitespace.
Developer toolsBase64 Encode
Encodes text as UTF-8 bytes, then standard Base64.
Developer toolsBase64 Decode
Decodes standard Base64 bytes as strict UTF-8 text.
Developer toolsURL Encode
Percent-encodes one URL component using UTF-8.
Developer toolsURL Decode
Decodes percent-encoded UTF-8 sequences in a URL component.
Developer toolsHTML Encode
Escapes &, <, >, double quotes and apostrophes for HTML text.
Developer toolsHTML Decode
Decodes numeric entities and amp, lt, gt, quot, apos and nbsp.
Developer toolsUUID Generator
Generates random version-4 UUIDs with the browser’s Web Crypto API.
Developer toolsUnix Timestamp Converter
Unix time measures elapsed seconds or milliseconds since 1970-01-01T00:00:00Z.
Developer toolsRegex Tester
Runs JavaScript regular expressions in an isolated Web Worker with a 300 ms execution limit.
Developer toolsJWT Decoder
Base64url-decodes the header and payload as UTF-8 JSON.
Developer tools