Developer utilities
Format JSON, decode JWTs, test regex, hash strings and more.
14 free tools · each done in 3 steps · nothing uploaded
JSON Formatter & BeautifierPretty-print JSON with 2, 4 or tab indents, sort keys, explore a collapsible tree, and see errors pinpointed by line and column.JSON Validator & RepairValidate JSON as you type with the exact line and column of each error, plain-English fix hints and one-click repair of common mistakes.JSON MinifierMinify JSON by stripping whitespace and line breaks, and see exactly how many bytes and what percentage you saved.XML Formatter & ValidatorPretty-print or minify XML, keep comments and CDATA intact, and check well-formedness with the error's line and column.YAML ⇄ JSON ConverterConvert YAML to JSON or JSON to YAML instantly, with multi-document support, sorted keys and errors shown by line and column.Base64 Encoder & DecoderEncode text or files to Base64 and decode it back, UTF-8 safe, with URL-safe output, data: URLs and binary file download.URL Encoder & DecoderPercent-encode or decode URLs and query values (encodeURIComponent vs encodeURI), and parse query strings into an editable table.Regex TesterTest JavaScript regular expressions with live match highlighting, a groups table, replace preview, cheat sheet and ready-made patterns.UUID Generator (v4 & v7)Generate random v4 or time-ordered v7 UUIDs, up to 1,000 at once, in upper case, without hyphens or with braces, and inspect any UUID.JWT DecoderDecode JSON Web Tokens locally: pretty header and payload, exp/iat/nbf as readable dates with an expired badge, optional HS256 verification.Hash Generator (MD5, SHA-256…)Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes or HMACs of text and files, and compare against an expected checksum.Unix Timestamp ConverterConvert Unix epoch timestamps to dates and back in any time zone, auto-detecting seconds or milliseconds, with a live current epoch.Cron Expression HelperExplain cron expressions in plain English, build schedules field by field, and preview the next 10 run times in local time or UTC.SQL FormatterFormat and beautify SQL for PostgreSQL, MySQL, SQL Server, BigQuery, Snowflake and more, with keyword case, indent and layout options.