All Developer Tools
Browse JSON, Base64, hash, regex, timestamp, and other paste-and-go developer tools. Everything runs in your browser —no account.
JSON & Data
Format, validate, minify, and convert without leaving the tab.
- JSON Beautifier & FormatterPaste messy JSON and get indented, readable output instantly. Format, copy, and fix common issues locally — no upload, no account.
- JSON ValidatorValidate JSON syntax in your browser. See pass/fail and parse errors without uploading the payload. Free, no signup.
- JSON Schema ValidatorValidate a JSON document against a JSON Schema in your browser. Catch missing fields and type mismatches locally.
- JSON MinifyStrip whitespace from JSON to a single compact line. Minify locally for APIs, storage, or size checks — no upload.
- JSON to YAML ConverterConvert JSON to YAML in your browser with js-yaml (or equivalent). Keep configs and secrets on your device.
- YAML to JSON ConverterTurn YAML into JSON in your browser. Handy for APIs and editors that only accept JSON — nothing uploaded.
- YAML FormatterReformat YAML with consistent indentation in your browser. Catch parse errors before you apply a manifest.
- JSON to CSV ConverterConvert a JSON array of objects to CSV locally. Nested objects need flattening rules — we show the limits upfront.
- CSV to JSON ConverterPaste CSV, get a JSON array of objects. Header row becomes keys. Runs in your browser — no upload.
- JSON EscapeEscape a string for safe inclusion inside JSON (quotes, backslashes, controls). Local tool — nothing uploaded.
- JSON UnescapeTurn escaped JSON string content back into readable text. Runs locally in your browser.
- JSON to XML ConverterConvert JSON to a simple XML representation in your browser. Best for flat/nested objects — document array rules clearly.
- XML to JSON ConverterConvert XML to JSON locally using the browser DOM parser. See how elements, text, and attributes map.
Encode & Decode
Base64, URL, HTML entities, JWT peek, query strings.
- Base64 EncodeEncode text to Base64 locally. Optional URL-safe alphabet and padding controls. Nothing is uploaded.
- Base64 DecodeDecode Base64 to text in your browser. Accepts standard and URL-safe input. No upload, no account.
- URL EncodePercent-encode text for query values or full URLs. Choose component vs full-URI mode. Runs entirely locally.
- URL DecodeDecode percent-encoded URLs and query values in your browser. No upload.
- HTML EncodeConvert characters to HTML entities (< > & "). Local escaping for examples and templates.
- HTML DecodeDecode HTML entities to plain text in your browser. Handy for scraped or escaped snippets.
- JWT DecodeDecode a JWT’s header and payload in your browser. Base64url only — not signature verification. Nothing uploaded.
- Query String ParserParse `?a=1&b=2` into a table or JSON, and serialize objects back to a query string. Local only.
Hash & ID
MD5/SHA digests, UUIDs, random strings — for checks, not vaults.
- MD5 Hash GeneratorGenerate an MD5 digest from text locally. For checksums and legacy systems — not password storage.
- SHA-1 Hash GeneratorCompute SHA-1 hashes in your browser via Web Crypto. For legacy checksums — not modern password storage.
- SHA-256 Hash GeneratorGenerate SHA-256 digests locally with Web Crypto. Useful checksums — not a password vault.
- UUID GeneratorGenerate UUIDs in your browser (v4 random, v7 time-ordered). Bulk copy. No signup.
- Random String GeneratorGenerate random strings with length and character-set options. Local CSPRNG — not a password manager.
Text & Regex
Quick JS regex, case/slug, diff, lorem, cleanup.
- Regex TesterTest JavaScript regular expressions with live highlights and match lists. Fast local tester — not a multi-flavor IDE replacement.
- Title Case ConverterConvert text to Title Case, UPPER, lower, camelCase, snake_case, or kebab-case in your browser.
- Diff CheckerPaste two texts and see added/removed lines. Browser-only diff for code and copy — nothing uploaded.
- Lorem Ipsum GeneratorGenerate Lorem Ipsum placeholder text locally. Control paragraphs or word count — no account.
- SlugifyTurn a title into a URL slug: lowercase, hyphens, stripped junk. Runs in your browser.
- Remove Line BreaksStrip line breaks, collapse spaces, or trim lines in pasted text. Local cleanup for logs and copy.
Time & Misc
Epoch —date, cron in plain English, hex/rgb, number bases.
- Epoch & Unix Timestamp ConverterConvert Unix epoch ↔ human dates in your browser. Auto-detect seconds vs milliseconds. Timezone-aware display.
- Hex to RGB ConverterConvert #RRGGBB (and short #RGB) hex colors to rgb()/rgba(). Local, instant.
- RGB to Hex ConverterConvert RGB or rgba() values to hex. Runs locally in your browser.
- Cron Expression ExplainerPaste a 5-field cron expression and read it in plain English. Local explanation for common schedules.
- Number Base ConverterConvert integers between binary, octal, decimal, and hex in your browser. Paste a value, pick bases.