Which files can I compress?

JPEG, PNG, WebP, AVIF, BMP and HEIC (iPhone) images; PDF documents; and MP4, MOV, WebM and MKV videos.

How much smaller will my file be?

Typically 60–90% for photos, phone videos and scanned PDFs. Files that are already well compressed may shrink less; if we can't make a file smaller, you get the original back.

Apps / Drop → Compress

DropCompress

Make any image, PDF or video smaller in seconds, or get it under the exact size limit you need.

Runs on your device. Nothing is uploaded.

Add your files

Images, PDFs and videos

Drop files here or click to choose. You can also paste an image.

Choose how small

Change it any time

More options

Image format Max image size PDF mode Flatten turns pages into images — text won't be selectable. Video resolution

Download

Your smaller files will show up here, ready to download.

Your files stay with you

Everything happens inside this browser tab. Nothing is sent to ANTB or anyone else, so it is safe for contracts, IDs and family photos.

Hit the limit, first time

"File too large"? Choose the limit and each file comes back just under it, at the best quality that fits.

One drop for everything

Photos, iPhone HEICs, scanned PDFs and videos together, up to 50 files at once. Download one by one or as a zip.

How it works

Images

Resized sensibly and re-encoded as WebP or JPEG. Location and camera data (EXIF) are stripped.

PDFs

Embedded photos and scans are recompressed while text stays sharp and selectable. Flatten mode goes further.

Videos

Re-encoded to H.264 MP4 at a sensible bitrate using your device's hardware encoder.

To an exact size

Pick a limit and each file is tuned, quality first and then dimensions, until it lands just under it.

Questions

Are my files uploaded?

No. Everything happens in this browser tab using Canvas, WebCodecs and WebAssembly. Your files never reach ANTB or anyone else — you can even disconnect from the internet once the page has loaded.

How do I get a file under a specific size?

Choose Fit under a size, then pick a limit (100 KB, 2 MB, 10 MB…) or type your own. Every image, PDF and video you drop comes back at the best quality that fits. Limits are counted the strict way (1 MB = 1,000,000 bytes), so the result fits however the website or app counts. If a file can't reach the limit you're told, and you get the smallest version we could make. A PDF that can't get there with its text intact is flattened to images, and labelled so.

Can I compress iPhone HEIC photos?

Yes. HEIC photos are opened on your device and saved as JPEG or WebP, which upload forms accept. The first HEIC loads a small decoder, which is then cached.

Why did a file barely shrink?

Some files are already tightly compressed (for example, a PDF that is mostly text, or a video exported at a low bitrate). If we can't make a file meaningfully smaller, you get the original back untouched. Try Strong, or Flatten mode for PDFs.

Which browsers are supported?

Any recent Chrome, Edge, Safari or Firefox. Video compression needs WebCodecs (Chrome/Edge 94+, Safari 16.4+, Firefox 130+). The first video or PDF loads a small engine, which is then cached.

Do I need an account?

No — compressing is always free, and you get 5 free downloads a day without signing in. A free ANTB account gives you unlimited downloads. Either way, your files are processed on your device and never uploaded.

Is there a file size limit?

Yes: up to 1 GB per video, 250 MB per PDF and 60 MB per image on a computer (300 MB, 100 MB and 30 MB on phones and tablets), and 50 files at a time. Everything is processed in your device's memory, so the limits keep the tab from crashing. Your files are never uploaded to our servers.