Edit PDFs, compress & convert images, run AI OCR, and format text directly in your browser. Fast, private, and 100% free.
Merge, split, compress, watermark, and convert PDF documents with 100% local privacy.
All-in-one PDF page studio: reorder, delete, rotate, extract, and split pages in one visual canvas.
Combine multiple PDF files into a single unified document with custom page order.
Add custom watermark stamps or insert page numbers (header & footer) into your PDF.
Convert images (JPG, PNG, WebP) to PDF documents or extract PDF pages to high-resolution images.
Sign PDF contracts and forms directly in your browser. Draw hand signature, upload stamp image, or type name with cursive font.
Reduce PDF file size with 3 quality presets (Low, Medium, High) and optional Grayscale conversion.
Resize, crop, compress, convert, and batch process images with high-performance local canvas.
Draw, annotate, and markup photos with MS Paint-like tools: Select Object, Area Select, Text, Line & Arrows, Rectangle, Highlighter, Fill Bucket, and Eraser.
Visual Studio to Crop, Rotate, Flip, and Resize images (single or batch with ZIP package) in one place.
Compress and convert images between JPG, PNG, WebP, and BMP formats with instant quality preview.
Pick exact pixel colors from any image with a zoom loupe magnifier. Extract dominant color palettes and copy HEX, RGB, HSL, and CMYK codes instantly.
Create custom QR codes for links, WiFi, contacts, emails, and scan QR codes locally via image or camera.
Generate classic favicon.ico, Apple Touch Icon, Android Chrome PWA icons, manifest.json, and HTML meta tags in one ZIP.
Extract text from scanned documents, photos, and PDFs with client-side AI OCR.
Format, clean, compare, convert case, and analyze text files safely in your browser.
Strip extra whitespace, redundant blank lines, HTML tags, and non-printable characters from text.
Interactive Markdown editor with real-time rendered preview, table support, and HTML export.
Format, beautify, minify, and validate JSON data with syntax tree inspection and error diagnostics.
Compare two text blocks or code snippets to find additions, deletions, and differences visually.
Test, debug, and preview regular expressions with real-time match highlighting, capture groups, and substitution testing.
100% private in-browser AI translation for text, subtitles (.srt), and documents without server uploads.
Generate secure keys, inspect tokens, compute hashes, and encrypt text with Web Crypto.
Decode, inspect, verify, and generate JSON Web Tokens locally in your browser with HMAC-SHA256.
Encode and decode Base64 strings, files, and URL percent-encoded query parameters with Unicode support.
Generate cryptographically secure random passwords, UUID v4, API tokens, and compute/verify cryptographic hashes (MD5, SHA-1, SHA-256/512) and file checksums.
Encrypt and decrypt text with AES-256-GCM, AES-256-CBC, or ChaCha20-Poly1305 and PBKDF2 using your secret password.
Explore the traditional Vietnamese Tam Tong Mieu calendar, calculate auspicious hours, and look up 64 I Ching hexagrams with zero server tracking.
Traditional Vietnamese lunar calendar with auspicious hours, solar terms, 12 duties, and 5-tier day evaluations.
Look up 64 I Ching hexagrams by phone number or date, and brute-force search for auspicious fortune numbers.
All-in-one home Feng Shui suite: calculate building age (Three Disasters, Kim Lau, Hoang Oc), favorable borrowing ages, ritual prayers, and Xuan Kong Flying Stars 24-mountain charts.
Interactive digital Lu Ban ruler to measure Feng Shui auspicious dimensions for clear door/window openings, furniture, and altars.
Calculate traditional Vietnamese / Eastern horoscope charts (Tu Vi Dau So) 100% in-browser with 14 main stars and major/minor periods.
Convert, trim, compress, and extract audio from video files locally with WebAssembly FFmpeg.
3 simple steps to private, instantaneous file transformation
Your file is loaded directly into your browser's RAM via the HTML5 File API. No bytes are sent across the internet.
Compiled WebAssembly modules and Web Workers execute conversions, mergers, and OCR directly on your machine.
Output files are generated instantly as Blob URLs and downloaded to your computer or phone. Memory is cleared right after.
Learn how in-browser WebAssembly and client-side cryptography protect your data
Traditional online file converters send your tax returns, invoices, and contracts to remote servers. Learn how client-side WebAssembly tools keep your data 100% private.
Discover the technical differences between PDF vector stream preservation and destructive rasterization when combining multiple large PDF files.
A comprehensive technical comparison of modern image compression formats, decompression latency, and transparency support for lightning-fast page speed.