Frequently Asked Questions

No. All compression happens in your web browser, on your own device. Your videos, images and PDFs are never sent to us or to anyone else. You can even disconnect from the internet after the page and its compression engine have loaded.

No. We never receive your files, so there is nothing to keep. When you close the tab, the compressed files disappear from your browser's memory too.

Your files stay on your device, which makes this one of the most private ways to compress them. As with any website, keep your browser up to date. Read how it works for the technical details.

Yes, by default. Metadata such as GPS location, device model and dates is removed. You can choose to keep it in the advanced settings.

Yes. All three compressors are free, with no account, no watermark and no limit on the number of files. The site is funded by a small number of clearly labelled ads.

No. Everything works in a modern browser on Windows, Mac, Linux, iPhone, iPad and Android.

Recent versions of Chrome, Edge, Firefox, Safari and Samsung Internet. Chrome and Edge are usually fastest for video, because they make the most of your device's hardware video encoder.

Yes. Add as many files as you like; they're processed one after another with the same settings. When they're done, you can download them individually or all together as a ZIP file.

If you close or reload the tab while a file is being compressed, the work is lost. The browser asks you to confirm so you don't lose it by accident.

There's no fixed limit, because nothing is uploaded. The limit is your device's memory. Most computers handle videos of 1–2 GB; phones are best with files under about 500 MB. The compressor warns you before starting a file that looks too large for your device.

Choose Target file size in the video or image compressor and enter the size you need, in MB for videos or KB for images. The compressor calculates the settings that fit.

It shouldn't be; the compressor retries with lower settings when a result is too large. With extremely detailed footage at a tiny target, it may not be possible to reach the size. Try a lower resolution, a bigger target or a shorter clip.

Some files are already well compressed. If the new file wouldn't be smaller, you'll see a message, and for PDFs we give you your original back. For images, converting to WebP or AVIF often helps.

Videos: MP4, MOV, WebM, MKV, AVI, WMV, FLV, M4V, 3GP, MPEG and TS, saved as MP4. Images: JPG, PNG, WebP, AVIF, still GIF and HEIC where your browser can open it. Documents: PDF.

Compression always trades some detail for size, but the default settings keep the difference very hard to see. Use a higher quality setting if you need it, and read compressing without visible quality loss.

MP4 with H.264 video and AAC audio plays on practically every phone, computer, TV and website. It's the safest format for sharing.

Not yet. The Image Compressor handles still images only, and tells you when a GIF is animated.