How do I convert a file online for free?

Drop your file onto FileFettle, select your output format, and click Convert. Your file is processed instantly inside your browser — no upload, no registration, completely free.

Do my files get uploaded to a server?

Never. FileFettle uses WebAssembly and the Canvas API to process files entirely in your browser. Zero bytes of your data are ever sent to any server.

What file formats can I convert?

Over 80 formats across 5 categories — images (JPG, PNG, WebP, AVIF, HEIC, GIF, SVG, TIFF, BMP), audio (MP3, WAV, FLAC, OGG, AAC, M4A, OPUS, AIFF, WMA), video (MP4, WebM, MOV, AVI, MKV, WMV, MPEG), documents (PDF, DOCX, TXT, HTML, Markdown), and data (CSV, JSON, XML, YAML, XLSX, XLS, ODS, TOML, INI).

Is there a file size limit?

No. Since conversion runs in your browser, there's no server-side size limit. The only constraint is your device's available RAM — which handles most files without issue.

Is FileFettle free to use?

Yes — completely free, forever. No subscriptions, no paywalls, no ads, no tracking. Optional voluntary contributions help keep the project running.

Why does my first video or audio conversion take a moment to start?

Video and audio conversion uses FFmpeg compiled to WebAssembly. The first time you convert, your browser downloads a ~30 MB package — this only happens once and is then cached, so subsequent conversions start instantly.

How do I convert an image to JPG, PNG, or WebP?

Drop your image (supports JPG, PNG, HEIC, GIF, TIFF, BMP, SVG, AVIF and more), choose your output format — JPG, PNG, WebP, etc. — optionally resize or adjust quality, then click Convert.

How FileFettle Works

All conversions happen in your browser. Your files never leave your device.

Drop or select your file

Choose output format

Adjust settings (optional)

Download instantly

Available Tools

PDF Merge

Combine multiple PDF files into a single document

Drag to reorder pages
Combine unlimited PDFs
Runs entirely in browser

PDF Split

Extract pages or page ranges from any PDF

Extract single pages
Extract page ranges
Batch extract multiple ranges

Image Resizer

Resize images to exact dimensions while preserving quality

Pixel-perfect resizing
Maintain aspect ratio
Batch resize multiple images

Image Compressor

Reduce image file sizes with adjustable quality

Format conversion (WebP, AVIF, JPG)
Quality slider
Batch compression

File Hash Checker

Generate checksums to verify file integrity

SHA-256, SHA-1, SHA-512, MD5
Verify downloads
Check file authenticity

Base64 Encoder/Decoder

Encode text/files to Base64 or decode Base64 strings

Text to Base64
File to Base64
Base64 to text

File Encrypt

Encrypt files with password protection

AES-256-GCM encryption
Password protected
Decrypt back to original

EXIF Metadata Viewer

View camera settings and metadata in JPEG photos

Camera model & settings
GPS location data
Photo timestamps

Frequently Asked Questions

Ready to get started?

No account required. All conversions happen entirely in your browser.

Start Converting →