{} DevTidy

Developer tools that never upload your data

28 fast, free tools for everyday dev work. Everything runs in your browser in a background worker, so API keys, tokens, customer data and production configs stay on your machine. Works offline once loaded.

JSON

JSON FormatterFormat, beautify and pretty-print JSON instantly in your browser.JSON ValidatorValidate JSON and find syntax errors with the exact line and column.JSON ViewerView JSON as a collapsible tree with types, array lengths and copyable paths.JSON MinifierMinify JSON by removing all whitespace and line breaks.

Converters

JSON to YAMLConvert JSON to clean YAML for Kubernetes, Docker Compose, GitHub Actions and OpenAPI.YAML to JSONConvert YAML to JSON and catch YAML syntax errors with line numbers.JSON to CSVConvert a JSON array to CSV for Excel or Google Sheets.CSV to JSONConvert CSV or TSV to a JSON array of objects.JSON to XMLConvert JSON to well-formed, indented XML.XML to JSONConvert XML to JSON with attributes as @keys and repeated elements as arrays.

Formatters & minifiers

XML FormatterFormat, pretty-print and minify XML.SQL FormatterFormat SQL for PostgreSQL, MySQL, SQLite, SQL Server, BigQuery and more.HTML BeautifierBeautify and indent messy or minified HTML, including inline CSS and JavaScript.HTML MinifierMinify HTML by removing comments and whitespace between tags while keeping pre, textarea and script content safe.CSS BeautifierFormat and indent minified CSS into readable rules, one declaration per line.CSS MinifierMinify CSS by removing comments, whitespace and redundant semicolons.JavaScript BeautifierBeautify minified or messy JavaScript and JSON-like code with your choice of indentation.JavaScript MinifierMinify JavaScript with Terser: compress, mangle names and strip comments, with syntax errors reported by line.

Encode & decode

Base64 Encode / DecodeEncode text to Base64 or decode Base64 to text with full UTF-8 and emoji support.File & Image to Base64Convert images, PDFs or any file to Base64 or a data URI, or decode Base64 back to a downloadable file.URL Encode / DecodePercent-encode or decode URLs and query strings, and break a URL into host, path and query parameters.JWT DecoderDecode a JWT to read its header and payload, with iat, nbf and exp shown as dates and expiry checked.

Generators

Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files to verify checksums.UUID GeneratorGenerate random UUID v4 or time-ordered UUID v7 in bulk, up to 10,000 at once.Timestamp ConverterConvert Unix epoch timestamps (seconds, milliseconds, micro, nano) to human dates and ISO 8601, or dates back to epoch.

Text & patterns

Regex TesterTest regular expressions live with match highlighting, capture groups, named groups and replace preview.Text DiffCompare two texts or code files and highlight added and removed lines or words.Cron ExplainerTranslate cron expressions into plain English and preview the next five run times.