Built for privacy, designed for everyone
Convertly is a privacy-first file format converter that runs entirely in your browser. No uploads, no servers, no tracking. Just fast, free, and unlimited file conversion for everyone.
Our Mission
File conversion shouldn't require uploading your personal files to a stranger's server. Yet that's exactly what most online converters do — CloudConvert, Convertio, Zamzar, and FreeConvert all upload your files to their cloud for processing.
We believe there's a better way. Modern browsers are powerful enough to handle most file conversions locally using technologies like Canvas API, Web Audio API, FFmpeg compiled to WebAssembly, and JavaScript. Convertly leverages these to process your files right in your browser — they never leave your device.
Why It Matters
Privacy: Your files may contain sensitive personal or business data. Server-side converters can see, store, and potentially leak that data.
Speed: No upload time means instant processing. Your file doesn't travel to a server and back.
Cost: Without server infrastructure for processing, we can offer unlimited free conversions with no daily limits.
How It Works
Convertly uses modern browser technologies to process files locally:
Canvas API
Image conversion & rendering
FFmpeg.wasm
Video & audio conversion
Web Audio API
Audio processing
pdf-lib & pdf.js
Document conversion
JavaScript
Data format conversion (JSON, CSV, XML, YAML)
Client-side ZIP
Archive extraction & compression
What We Convert
Document
18 tools — Convert Word, PDF, Excel, PowerPoint, EPUB, HTML and more
Image
24 tools — Convert HEIC, WebP, SVG, ICO, PNG, AVIF, BMP, TIFF and more
Data
7 tools — Convert JSON, CSV, XML, YAML, SQL and more
Audio
8 tools — Convert MP3, WAV, AAC, FLAC, M4A, OGG and compress audio files
Video
9 tools — Convert MOV, MP4, WebM, MKV, AVI, GIF and compress video files
Archive
3 tools — Convert and extract ZIP, RAR, 7Z, TAR archives