Convert
File converters that never upload your files
These converters work the opposite way to the big conversion sites: instead of uploading your file to a server, waiting in a queue, and downloading the result, everything happens inside your own browser. Your photos and files never travel anywhere, results are instant, and there are no size tiers or watermarks because no server is doing the work. Convert iPhone HEIC photos, modern WebP images, PNGs, JPGs and SVGs, compress and resize for the web, and more, free, with no account.
Guide
Which converter actually solves your file problem?
The trick with file conversion is naming the real problem first, because "convert" and "compress" solve different things.
If an app or website has rejected a file, you have a format problem, so reach for a converter:
- HEIC to JPG for iPhone photos that Windows, older editors or web forms refuse to open
- WebP to JPG when a downloaded image won't import into your usual software
- PNG to JPG to strip a bulky screenshot down to a shareable photo (it flattens transparency onto a background color you pick)
- Image Converter when you're doing a mixed batch or want JPG, PNG, WebP and HEIC options in one place
- MOV to MP4 or WebM to MP4 for videos that play on your Mac or in-browser but nowhere else
If the file opens fine but is simply too big to email, upload or attach, you have a size problem, so reach for Image Compressor or Video Compressor instead. Same for audio: WAV to MP3 turns a huge uncompressed recording into a file a fraction of the size that still plays everywhere.
A quick rule: converting into a lossless format (JPG to PNG) never loses detail; converting into JPG, WebP or MP3 trades a little quality for a lot of size, and you set how much.
What these tools are not for: they change a file's container or encoding, not its contents. They won't pull the text out of a scanned PDF, edit what's inside a video, or magically sharpen a photo that was already blurry. And because everything runs in your browser tab, a two-hour 4K video can exhaust your device's memory. For very large video, expect to trim it first.
FAQ
Frequently asked questions
Is there a file converter that does not upload my files?
Yes. That is exactly what these are. The conversion runs inside your browser using its own image decoding, so your files never cross the network. Sites that convert on servers cannot make that promise; here it is how the tools are built.
Why are these converters faster than the big conversion sites?
There is no upload, no queue and no download step, the moment your device finishes the conversion, the file is saved. For everyday photos that takes a second or two, where upload-based sites spend most of their time moving your file around.
Is there a limit on file size or number of conversions?
No metered limits, your own device does the work, so there is nothing for us to cap or charge for. The practical ceiling is your device's memory, which handles normal photos and batches comfortably.
Do the converters add a watermark?
Never. The output is your image in the new format, nothing more. Quality is controlled by you where the format allows it, and lossless conversions (like JPG to PNG) keep every pixel as it was.
Will converting reduce my image quality?
It depends on the direction. Converting into a lossless format like PNG keeps every pixel; converting into JPG or WebP applies the quality level you choose, and the default settings are picked to be visually indistinguishable for photos.
Why does converting in the browser keep my files more private than a normal conversion site?
These tools decode and re-encode the file using your browser's own engine, so the file never leaves your device. A typical conversion website has to upload your file to its servers, process it there, then hand back a download, which means your photo, recording or document has sat on someone else's machine. Local conversion removes that round trip entirely, which is why it's both faster and safer for anything sensitive.
What's the real difference between compressing a file and converting it?
Converting changes the format, the way the data is packaged, so a HEIC becomes a JPG or a MOV becomes an MP4, without necessarily aiming to shrink it. Compressing keeps the same format but discards data your eyes or ears are unlikely to miss, to make the file smaller. They often overlap, since moving a PNG screenshot to JPG usually shrinks it too, but if your only goal is a smaller file at the same format, use a compressor.
Will I lose quality every time I convert an image?
Only when you convert into a lossy format like JPG or WebP, and even then you control how much through the quality setting. Converting into a lossless format such as PNG keeps every pixel exactly as it was. The catch is that quality already lost can't come back, so turning a heavily compressed JPG into a PNG gives you a bigger file, not a sharper one.