Browser-only tools that run 100% locally. No data is ever sent anywhere.
Paste or drag & drop an OpenAPI schema (JSON/YAML) to instantly preview it with Swagger UI and see validation warnings.
Drop or select images (PNG, JPEG, WebP, etc.), reorder them by dragging, and download as a single PDF.
Upload a PDF and rearrange it into a foldable saddle-stitch booklet — 2 pages per sheet, ready to print double-sided, fold, and staple.
Paste JSON to format, validate, and syntax-highlight it instantly. Minify, copy, or export as YAML.
Convert PDF, DOCX, PPTX, and other documents to Markdown using Cloudflare Workers AI.
Encode text or files to Base64, or decode Base64 back to text and downloadable files. Full UTF-8 support.
Paste a JWT to decode its header, payload, and check expiration status instantly.
Paste two texts side by side and see a highlighted diff with additions, deletions, and line numbers.
Write regex patterns with live matching, capture group highlighting, and a quick reference guide.
Paste or drop a CSV file to view it as a sortable, filterable table with pagination.
Generate UUIDs (v4, v7), ULIDs, and Nanoids in bulk with timestamp decoding.
Parse cron expressions to see the next run times and a plain English description.
Convert colors between HEX, RGB, HSL, and oklch with a visual picker and sliders.
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files.
Resize, compress, and convert images between JPEG, PNG, and WebP with quality control.
Paste or drop an SVG to strip metadata, remove unused elements, and reduce file size.
Generate QR codes with custom size, colors, and error correction. Download as PNG or SVG.
Generate secure random passwords or passphrases with entropy strength estimation.
Drop an image to view its EXIF metadata, then strip it and download a clean copy.
Merge, split, reorder, rotate, and delete pages across one or multiple PDFs — drag to rearrange and export.
Convert every page of a PDF into PNG, JPEG, or WebP images with adjustable resolution and quality. Download all as a ZIP.
Shrink PDF file size by rasterizing pages to JPEG, with quality, scale, and grayscale controls.
Convert HEIC, WebP, AVIF, PNG, JPEG, GIF, and BMP images to any format — nothing is ever uploaded.
Remove image backgrounds with an on-device AI model — transparent PNG output, no uploads.
Convert video/audio to MP4, WebM, GIF, MP3, or WAV and trim clips — all locally with ffmpeg.wasm.
Live split-pane Markdown editor with a formatting toolbar, GitHub-style preview, auto-save, and MD/HTML/PDF export.
Convert data between JSON, YAML, and TOML with live preview, format auto-detection, and copy/download.
Parse Unix timestamps or date strings and convert them across any timezone, with a live-updating clock.
Encode/decode URL components, parse a URL into editable fields, and build query strings.
Convert text between 12 case formats with live character, word, sentence, and reading-time stats.
Generate lorem ipsum placeholder text and tables of realistic fake data as JSON, CSV, SQL, or a table.
Convert JSON arrays to CSV (with nested flattening) and CSV back to JSON, with a live preview table.
Convert between HTML and Markdown in both directions, with a sanitized rendered preview.
Escape and unescape strings across 12 formats — JSON, JS, HTML, XML, URL, SQL, CSV, Shell, and more.
Convert numbers between binary, octal, decimal, hex, and any base 2–36, with two's-complement and bitwise views.
Encrypt and decrypt text with AES-256-GCM (PBKDF2 password) entirely in your browser.
Generate PGP keypairs and encrypt, decrypt, sign, and verify messages — keys never leave your device.
Hash a password with bcrypt (adjustable cost factor) and verify a plaintext against any bcrypt hash.
Decode PEM X.509 certificates or chains — subject, issuer, validity, fingerprints, SANs, and key usage.
Rasterize SVG markup or files to PNG, JPEG, or WebP at any scale or explicit pixel size.
Generate a complete favicon set (ICO, PNGs, apple-touch, manifest, HTML snippet) from any image as a ZIP.
Extract a dominant color palette from any image and export as HEX/RGB, CSS variables, JSON, or Tailwind colors.
Crop images with a resizable box, aspect presets, rotate/flip, resize, and export to PNG/JPEG/WebP.
Convert images to ASCII art, or generate ASCII block-letter banners from text.
Convert between CSV and Excel/ODS spreadsheets — preview sheets and download as CSV or XLSX.
Write and live-preview Mermaid diagrams with example templates and SVG/PNG export.
Build professional invoices with live preview, line items, tax/discount, and one-click PDF export.
Run JSONPath and JMESPath queries against JSON with live results, match counts, and a cheat sheet.