Developer Tools

Format, validate, and minify JSON online. Free, no signup — your data never leaves your browser.

Format SQL queries online — beautify MySQL, PostgreSQL, SQLite, SQL Server, Oracle, and BigQuery.

Beautify or minify HTML in your browser. Pure client-side — your markup never leaves your device.

Beautify or minify CSS rules instantly in your browser. Free, no signup, no upload.

Validate, reformat, and minify YAML in your browser. Catches syntax errors with line numbers.

Beautify or minify XML using your browser's native parser. No dependencies, fast and accurate.

Reformat Markdown with Prettier. Consistent spacing, list markers, and link layout.

Beautify with Prettier or minify in your browser. Supports modern syntax — async/await, optional chaining, JSX.

Clean up Python indentation, collapse blank lines, normalize string quotes. Indentation cleaner, not full PEP-8.

Reformat PHP source in your browser. PSR-12-friendly defaults, brace-style toggle, opener normalization.

Reindent Java source with K&R or Allman brace style. Pure client-side, no compile.

Reindent C# source with Allman braces, auto-property normalization, and expression-bodied member tidy-up. Indentation tidy, not a full Roslyn format.

Reindent C or C++ source — brace style, indent width, and preprocessor placement controls. Indentation tidy, not a full clang-format.

Reindent Ruby, Lua, or Perl source. One tool, three keyword-driven languages.

Pretty-print GraphQL queries, mutations, and SDL using the official graphql/language parser.

Convert between LESS, SCSS, SASS, Stylus, and CSS. Real compilers for "to CSS" paths, heuristics for the rest.

Minify JavaScript with terser. Mangle, compress, comment policies — and a before / after size comparison.

Minify HTML with html-minifier-terser. Collapses whitespace, removes comments, inline CSS / JS minification. Size savings shown live.

Convert CSV (or TSV / pipe-separated) data to JSON. Auto-detects delimiter, RFC 4180 compliant.

Convert a JSON array of objects to CSV. Optional dot-path flatten for nested data.

Convert JSON to YAML in your browser. YAML 1.2 spec.

Convert YAML to JSON in your browser. Catches syntax errors with parser messages.

Convert JSON to XML in your browser. Configurable root element, attribute prefix, and text key.

Extract one column from CSV, TSV, or any delimited text. Pick by column number or header name. RFC 4180 compliant.

Convert XML to JSON in your browser. Native DOMParser with configurable attribute prefix, text key, and compact mode.

Convert CSV (or TSV / pipe-separated) data to XML. Configurable root and record element names. Header row becomes column tags.

Generate INSERT statements from CSV. MySQL, PostgreSQL, SQLite, or SQL Server dialect, with optional CREATE TABLE.

Strip HTML tags and decode entities to plain text. Toggles for line breaks, links, and whitespace preservation.

Extract <table> elements from HTML into CSV, TSV, JSON, or Markdown. Picks individual tables when the page has more than one.

Convert HTML to Markdown using Turndown. ATX or Setext headings, bullet style, code-fence style — fully customizable.

Render Markdown to HTML with live preview. GFM tables, task lists, fenced code blocks. Powered by marked.

Generate a Java POJO from JSON. Toggles for Jackson annotations, Lombok, or Java 16+ records. Nested objects become nested classes.

Convert a Java POJO (Plain Old Java Object) instance into JSON using Jackson, Gson, or Moshi. Copy-paste-ready code recipes plus the reverse converter when you need to scaffold the POJO itself.

Encode and decode Base64 text or files. Supports standard and URL-safe variants. Free, no signup.

Encode and decode URLs and query string parameters. Percent-encoding for safe transmission.

Encrypt and decrypt text with AES-256-GCM and a password. PBKDF2-SHA256 key derivation, runs entirely in your browser.

Encode and decode Base16, Base32 (RFC 4648), Base32 Crockford, Base85 (ASCII85), and Base91 in your browser.

Convert text to UTF-8 hex bytes, decimal bytes, \xAB or \u{HEX} escape sequences — and back.

Encode and decode HTML entities — named, decimal, and hex. 250+ HTML5 entities included.

Escape and unescape strings for HTML, XML, Java, C#, JavaScript, JSON, CSV (RFC 4180), and SQL.

Compute MD5 digest of text or files (up to 50 MB) in your browser. Output in hex or Base64.

Compute SHA-256 digest of text or files in your browser using Web Crypto API. Output in hex or Base64.

Compute SHA-1 digest of text or files in your browser using Web Crypto API. Useful for Git commit hashes and legacy systems.

Classic ROT13 cipher in your browser. Encoding and decoding are the same operation.

Encrypt and decrypt with the classic Caesar shift cipher. Includes auto-detect using English letter frequency.

Compute MD4, MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3, Keccak-256, CRC-32 and NTLM hashes of text or files in your browser.

Convert numbers between decimal, binary, octal and hexadecimal in a live 4-row grid. BigInt-safe with optional signed 32 / 64-bit mode.

AND, OR, XOR, NAND, NOR, XNOR, NOT and shift operations on two BigInt operands. Results shown in decimal, binary, octal and hex at once.

Convert IPv4 and IPv6 between dotted, decimal integer, hex, octal, binary, and canonical / expanded forms. Auto-detects the input format.

Convert text to UTF-8 hex bytes and back. Pick from five separators on encode; decode auto-strips any common separator.

Convert text to 8-bit binary and back. UTF-8 aware with optional byte and nibble spacing for readability.

Convert characters to ASCII / Unicode codepoints in decimal, hex, binary and octal — or render a live table for any input string.

Convert any date and time between IANA timezones. DST-aware, shareable, runs entirely in your browser.

Convert Unix timestamps (seconds or milliseconds) to ISO, UTC, RFC 2822, local, and relative formats. Live "Now" panel.

Translate a cron expression to plain English and preview the next 5 fire times. Supports standard 5-field and 6-field with seconds.

Test JSONPath expressions against your JSON. Live evaluator with path and value results, filters, slices, recursive descent.

Test XPath expressions against XML or HTML using your browser's native XPath engine. Live results table.

Generate 1–100 strings that match any regex pattern. Great for test data, fixtures, and fuzzing.

Validate JSON5 with line and column error reporting. Supports comments, trailing commas, single quotes, hex numbers.

Compare two blocks of text — side-by-side, inline, or unified patch. Line, word, or character granularity.

Structural JSON comparison. Color-coded paths for added, removed, and changed keys. Optional ignore-array-order mode.

Turn any text into a clean URL slug. Transliterates diacritics, strips punctuation, optional stopword removal.

Build GitHub Flavored Markdown tables in a live grid. Paste TSV or CSV, set alignment per column.

Build campaign-tagged URLs for Google Analytics, GA4, Plausible, PostHog. Validates URL and saves your last 5 locally.

Break a URL into scheme, credentials, host, port, path, query and hash. Percent-decoded query parameters in a live table.

Live HTML / CSS / JS playground with sandboxed iframe preview. Auto-saves to localStorage. Pure client-side.

Generate UUIDs online — v1, v4, v7, and Nil. Bulk generation up to 10,000. Free, no signup.

Generate strong, cryptographically random passwords. Configurable length and character sets — runs in your browser.

Generate fake JSON from a schema using faker.js. Multi-output: JSON, CSV, TSV, XML. Free, runs in your browser.

Obfuscate JavaScript with control-flow flattening, string array, dead-code injection and identifier mangling. Three presets, runs in your browser.

Convert text between 14 cases — UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case, CONSTANT_CASE, and more.

Sort lines alphabetically, numerically, by length, or just reverse. Locale-aware, case-insensitive and unique options.

Count word occurrences with rank, count, and percent. Stopword filter, top-N selector, CSV export of the full table.