Tools

Format. Convert. Generate.

Fast, private browser tools for data, encoding, security, and everyday development work.

DA

Data Tools

Format, validate, and transform structured data.

Data Tools
JSON FormatterFree online JSON formatter and validator with Monaco, JSONPath, TypeScript/YAML tools, diff, schema validation, tree view, and local processing.
jsonformattervalidator
Data Tools
JSON Schema GeneratorGenerate JSON Schema from sample JSON and validate data locally with Draft 2020-12 or Draft 7.
json schema generatorgenerate json schema from jsonjson schema validator
Data Tools
SQL Formatter / SQL BeautifierFormat, beautify, and minify SQL queries online with local processing and dialect options for generic SQL, MySQL, PostgreSQL, SQLite, and T-SQL.
sqlformatterminifier
Data Tools
CSV to JSON / JSON to CSVConvert CSV, TSV, and JSON locally with header controls, delimiter options, type inference, table preview, copy, and download.
csvjsoncsv to json
Data Tools
Text Diff CheckerCompare two text blocks locally with side-by-side or unified diff, line and word highlighting, ignore whitespace/case, and change statistics.
text diffdiff checkercompare text
Data Tools
YAML Formatter / ValidatorFormat, validate, and convert YAML locally—Kubernetes, GitHub Actions, Docker Compose, JSON ↔ YAML, with line/column error hints.
yamlformattervalidator
Data Tools
XML Formatter / ValidatorFormat, validate, and minify XML with Monaco editing—syntax highlighting, error line markers, Maven POM, Android manifests, SVG, and sitemaps.
xmlformattervalidator
Data Tools
UTC Timestamp ConverterConvert Unix and UTC timestamps to local time, ISO 8601, seconds, and milliseconds—and back. 100% local in your browser.
timestamputc timestamp converterunix timestamp converter
EN

Encoding Tools

Encode and decode common developer formats.

Encoding Tools
Base64 Encoder / DecoderEncode and decode Base64 online—UTF-8, URL-safe, files, image paste, MIME wrap. 100% local.
base64encodedecode
Encoding Tools
URL Parser / Query BuilderParse URL parts, edit query parameters, and rebuild encoded URLs locally in your browser.
url parserquery string parserurl query builder
Encoding Tools
URL Encoder / DecoderEncode and decode URLs, URI components, form values, and query strings locally in your browser.
urluriencode
GE

Generator Tools

Generate IDs, passwords, and useful development values.

Generator Tools
UUID Generator OnlineGenerate random UUID v4 values online, copy batches, format IDs, and inspect existing UUIDs locally in your browser.
uuiduuid generatorguid generator
Generator Tools
Password GeneratorGenerate strong passwords and memorable passphrases locally with length, character sets, batch copy, and strength guidance.
passwordgeneratorpassphrase
Generator Tools
QR Code GeneratorGenerate QR codes from text or URLs locally in your browser. Choose size and error correction, then download PNG instantly.
qr codegeneratorurl
WE

Web Tools

Inspect and prepare web content quickly.

Web Tools
Markdown Preview / Markdown to HTMLPreview Markdown online with GitHub Flavored Markdown support, inspect headings and links, then copy or download sanitized HTML locally.
markdownmarkdown previewmarkdown to html
Web Tools
CSS Unit Converter / Clamp GeneratorConvert px, rem, em, %, vw, and vh with configurable context, then generate fluid clamp() CSS for typography and spacing.
css unit converterpx to remrem to px
Web Tools
cURL ConverterConvert common cURL commands to JavaScript fetch or Axios code locally without sending requests.
curl to fetchcurl to axioscurl converter
Web Tools
HTML Entity Encoder / DecoderEncode and decode HTML entities locally—named, decimal, and hex forms, batch lines, and text preview for CMS and frontend work.
html entityencodedecode
Web Tools
Regex TesterTest regular expressions online with live match highlighting, capture groups, flags, and replace preview—100% local in your browser.
regexregexpregular expression
Web Tools
Color Picker & ConverterConvert colors between HEX, RGB, and HSL with live preview, WCAG contrast hints, copy buttons, and browser eyedropper support.
color pickerhexrgb
Web Tools
Cron Expression Parser OnlineParse cron expressions online into human-readable schedules, preview next run times locally, and build Unix crontab expressions.
croncron parsercron expression parser
SE

Security Tools

Inspect tokens, hashes, and security-related formats.

Security Tools
JWT Decoder OnlineDecode JWT tokens online and locally: view header, payload, exp/iat/nbf times, and signature limits without uploading tokens.
jwtjwt decodejwt decoder
Security Tools
Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes and HMAC digests for text and files locally—batch mode included.
hashhmacmd5
AI

AI Workflow Tools

Check, debug, and prepare AI-assisted code changes from Cursor, Copilot, Claude Code, Codex, and vibe coding tools.

AI Workflow Tools
AI Coding Ship ChecklistGenerate a local launch checklist for AI-built apps and AI-assisted code changes: build, env vars, auth, payments, SEO, mobile, docs, and release notes.
AI coding checklistAI app launch checklistvibe coding checklist
AI Workflow Tools
AI Code Review ChecklistReview AI-generated code changes from Cursor, Claude Code, Codex, Copilot, Windsurf, ChatGPT, Lovable, Bolt, or Replit Agent before merge or deploy.
AI generated code review checklistreview AI generated codeAI code review checklist
AI Workflow Tools
Bug Report Packet BuilderTurn errors, reproduction steps, recent AI changes, and attempted fixes into a clear debugging packet for AI coding tools or human developers.
AI debugging promptbug report for AI codingdebug AI generated code
AP

App Store Assets

Compose, resize, and prepare App Store and Google Play screenshots and listing assets locally.

App Store Assets
App Store Screenshot ComposerTurn raw app screenshots into polished App Store and Google Play marketing images with templates, copy, device frames, official presets, and local batch export.
app store screenshot generatorgoogle play screenshot makerapp store screenshot template
App Store Assets
App Market Image ResizerCrop and resize App Store / Google Play screenshots, feature graphics, and icons to official sizes in your browser. Batch zip + upload checklist.
app store screenshot sizegoogle play feature graphic sizeapp store screenshot generator
App Store Assets
App Icon Set GeneratorUpload an existing logo, crop or pad it once, and export preset PNG icon sizes for iOS, Android, App Store, and Google Play. No AI generation.
app icon generatorapp icon resizerios app icon generator
IM

Image Tools

Crop, resize, and optimize images locally for docs, apps, and the web.

Image Tools
Image Cropper / Screenshot CropperCrop images and screenshots online in your browser—fixed ratios, custom output sizes, PNG/JPEG/WebP export. 100% local, no upload.
image croppercrop image onlinecrop screenshot
Image Tools
Image Compressor / WebP ConverterCompress images and convert to WebP, JPEG, or PNG in your browser—quality slider, resize, batch zip. 100% local.
image compressorcompress image onlinewebp converter
Image Tools
Image Label Overlay / Brand Watermark CoverCover image corners or bottom labels with draggable brand-style overlay templates. Add clean badges, glass plates, icon labels, or stickers locally in your browser.
image label overlaybrand watermark coveradd label to image
Image Tools
Responsive Image GeneratorGenerate multi-width WebP, JPEG, or PNG assets from one source image and copy srcset, picture, and Next.js Image snippets. 100% local.
srcset generatorresponsive image generatorpicture tag generator
Image Tools
Favicon / PWA Icon GeneratorGenerate favicon, Apple touch icon, and PWA PNG icons from one logo. Zip download + HTML link and manifest snippets. 100% local.
favicon generatorpwa icon generatorapple touch icon generator
Image Tools
SVG Optimizer / Data URI GeneratorOptimize SVG, detect risky markup, and copy URL-encoded or Base64 Data URI and CSS background snippets. 100% local.
svg optimizersvg minifiersvg data uri generator