Format.Convert.Generate.
A quieter toolbox for daily development work.
Your tools
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A focused workflow for app launches
App Store Assets
Compose store marketing screenshots, export exact App Store and Google Play sizes, and generate icon PNG sets from your existing logo—all locally in the browser.
01App Store Screenshot ComposerCompose headlines, backgrounds, and device frames around real app captures.02App Market Image ResizerCrop finished artwork to exact store presets and export an upload-ready zip.03App Icon Set GeneratorExport preset iOS, Android, and store listing icon PNGs from an existing logo.
Your screenshots and artwork stay in your browser throughout the workflow.
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.
Data Tools
JSON Schema GeneratorGenerate JSON Schema from sample JSON and validate data locally with Draft 2020-12 or Draft 7.
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.
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.
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.
Data Tools
YAML Formatter / ValidatorFormat, validate, and convert YAML locally—Kubernetes, GitHub Actions, Docker Compose, JSON ↔ YAML, with line/column error hints.
Data Tools
XML Formatter / ValidatorFormat, validate, and minify XML with Monaco editing—syntax highlighting, error line markers, Maven POM, Android manifests, SVG, and sitemaps.
Data Tools
UTC Timestamp ConverterConvert Unix and UTC timestamps to local time, ISO 8601, seconds, and milliseconds—and back. 100% local in your browser.
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.
Encoding Tools
URL Parser / Query BuilderParse URL parts, edit query parameters, and rebuild encoded URLs locally in your browser.
Encoding Tools
URL Encoder / DecoderEncode and decode URLs, URI components, form values, and query strings locally in your browser.
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.
Generator Tools
Password GeneratorGenerate strong passwords and memorable passphrases locally with length, character sets, batch copy, and strength guidance.
Generator Tools
QR Code GeneratorGenerate QR codes from text or URLs locally in your browser. Choose size and error correction, then download PNG instantly.
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.
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.
Web Tools
cURL ConverterConvert common cURL commands to JavaScript fetch or Axios code locally without sending requests.
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.
Web Tools
Regex TesterTest regular expressions online with live match highlighting, capture groups, flags, and replace preview—100% local in your browser.
Web Tools
Color Picker & ConverterConvert colors between HEX, RGB, and HSL with live preview, WCAG contrast hints, copy buttons, and browser eyedropper support.
Web Tools
Cron Expression Parser OnlineParse cron expressions online into human-readable schedules, preview next run times locally, and build Unix crontab expressions.
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.
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.
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 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 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.
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 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 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.
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 Tools
Image Compressor / WebP ConverterCompress images and convert to WebP, JPEG, or PNG in your browser—quality slider, resize, batch zip. 100% local.
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 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.
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.
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.