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All 34 developer tools
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34 tools
Format & Validate
JSON Repair Fix invalid JSON automatically. Recovers from trailing commas, single quotes, unquoted keys… JSON Schema Validator Validate a JSON document against a JSON Schema and see every violation with its path, the… JSON Formatter & Validator Format, validate and minify JSON in your browser. Catch syntax errors with the exact line and… YAML → JSON Converter Convert YAML to JSON instantly in your browser. Handles anchors, multi-line strings, flow style… XML Formatter & Minifier Pretty-print or minify XML in your browser. Validates well-formedness, reports the exact line… SQL Formatter Format SQL into readable, consistently indented queries. Supports SELECT, JOIN, CTEs… CSV → JSON Converter Convert CSV to JSON in your browser with control over delimiters, quote handling and type… JSON → CSV Converter Convert a JSON array or object into CSV with flattened nested keys, custom delimiters and a… HTML Entity Encoder Encode text to HTML entities or decode entities back to plain text. Handles named entities and…
Developer Utilities
cURL Converter Convert a cURL command into fetch, JavaScript, Python requests, Go, PHP, Ruby, Rust or HTTPie… Case Converter Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case… .gitignore Generator Generate a .gitignore file for your stack, with sensible defaults, editor files, OS files and… Regex Tester & Explainer Test a regular expression against sample text with every match highlighted, the capture groups… Cron Expression Builder Build a cron expression from plain English, see the next run times, and get the equivalent for… Unix Timestamp Converter Convert Unix timestamps to human-readable dates and back, in seconds, milliseconds… JSON Schema Generator Generate a JSON Schema from a sample document, with inferred types, required fields and nested… Text Diff Checker Compare two blocks of text line by line and word by word, with additions, deletions and changed… JSON Diff & Comparator Compare two JSON documents by structure rather than by text. Reports added, removed and changed… .env Editor & Parser Parse a .env file, mask secret values, spot duplicates and invalid keys, and copy a shell-ready… UTM Campaign Builder Build campaign URLs with correct UTM parameters, validate them and check whether a link is… HTTP Status Code Reference A complete reference of HTTP status codes: what each one means, when to use it, and how… Markdown Live Preview Write Markdown on the left and see the rendered result on the right, with GitHub-flavoured… WCAG Contrast Checker Check a foreground and background colour pair against WCAG 2.2 AA and AAA contrast… Nano ID Generator Generate Nano ID style identifiers with a custom alphabet and length, using crypto-grade… Find & Replace Tool Find and replace text with plain strings or regular expressions, case sensitivity and… Date Difference Calculator Calculate the exact difference between two dates in days, hours, minutes and seconds, with…
Create & Share
Encode & Hash
Base64 Encoder & Decoder Encode text to Base64 or decode Base64 back to text, with URL-safe output, UTF-8 handling and… URL Encoder & Query Parser Percent-encode or decode URLs, and parse a query string into readable key and value pairs… Hash Generator Generate SHA-256, SHA-384 and SHA-512 digests, plus HMAC signatures, directly in your browser… JWT Decoder & Inspector Decode JSON Web Tokens in your browser and inspect the header, payload, signature and expiry… UUID Generator Generate UUID v4 (random) and UUID v7 (time-ordered) identifiers in bulk, with options for… Checksum Calculator Compute CRC32, Adler-32, Fletcher-16 and CRC-16 checksums of any text in your browser, with hex…
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