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.

QR Code Generator

Create QR codes for 21 kinds of data — links, Wi-Fi, contacts, payments and more. Generated in your browser, so every code is static: unlimited scans, no expiry, no tracking.

Unlimited scansNever expiresNo account requiredNo tracking redirect

Data type

🌐 Website / URL

Any web link — pages, Zoom or Teams meetings, YouTube videos.

URL *

Fill in the required website / url fields to see your code.

Download

Customise

Style

Module shape

Corner (eye) shape

Colours

Modules

#000000

Background

#ffffff

Transparent

Corners

Colour separately

Keep the modules darker than the background - inverted codes fail on many scanners.

Logo

PNG, JPG or SVG. Your image stays on your device.

Output

Size - 512x512 px

Snapped to a whole number of pixels per module so the code stays sharp.

Quiet zone - 4 modules

The clear border scanners need to find the code.

Error correction

Balanced. The usual choice for print.

🔒QR codes are generated entirely in your browser. Nothing you type is uploaded, and because the data is baked into the code itself there is no short link to expire, no scan limit and no redirect service tracking whoever scans it.