Free · No upload · No watermark · No signup
Compress a video, image
or PDF to fit any limit
Without uploading it anywhere. Compression runs on your own machine, so there is no queue and no cap — and the result is measured, not estimated, so it is genuinely under the limit rather than approximately under it.
2Add your file
Video, images and PDFs, all compressed on your own machine. No upload, no account, no watermark, no limit on how many files.
Three kinds of file
What you can drop in
Each one reaches your number a different way, because each has a different dial to turn.
Video
MP4, MOV, WebM, MKV, AVI
Re-encoded with your machine's own hardware encoder, then measured and re-encoded if it came in over.
Images
JPEG, PNG, WebP, AVIF, GIF, BMP
Quality is bisected against real measurements — around eight encodes, each a few milliseconds — so it lands just under your limit rather than far below it.
PDFs
Any PDF up to 300 pages
A lossless rewrite is tried first, which keeps text selectable. Only if that is not enough do the pages become images, and you are told before it happens.
Office files and archives — .docx, .xlsx, .zip — are turned away on purpose. They are already compressed inside, so squeezing them again typically saves under 2%, and with no quality to trade there is no way to guarantee they land under your number. Promising otherwise is the one thing this tool will not do.
Nothing is uploaded
Compression runs on your own machine using your browser's built-in encoders. The file never touches a server, so there is no queue, no upload bar, and no copy of it anywhere but your disk.
Guaranteed under the limit
We encode, measure the actual bytes, and try again if it came in over. You get a file that is genuinely under the number -- not approximately under it.
No watermark, no signup, no cap
Running on your device costs us nothing per file, so there is nothing to ration. Unlimited files, no account, no watermark, permanently.
Reference
Current platform limits
The number a platform advertises is not always the number your file has to come in under. Where they differ, we target the one that actually works.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
They advertise 25MB, but the file itself has to be smaller.
They advertise 20MB, but the file itself has to be smaller.
Advertised and enforced at the same number.
They advertise 250GB, but the file itself has to be smaller.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Advertised and enforced at the same number.
Presets
Compress video to a set size
Each of these is the same tool, already set to that number.
Compress images to a set size
The sizes exam, visa and job portals ask for — quality is bisected against the real byte count to land just under.
Compress pdfs to a set size
A lossless rewrite is tried first at every one of these, so the text can stay selectable.
Guides
Why your file is bigger than you expected
The arithmetic behind every number on this site, and what to do when a file will not fit at all.
- Compressing a scanned PDFA scan has no text to protect, so the usual lossless pass saves almost nothing. What is left is a resolution decision — and there is a right way to make it.6 min read
- Compressing a screenshotScreenshots are PNGs of a huge display, which is why a picture of some text is bigger than a photograph. The fix is almost never a quality slider.6 min read
- Compressing an image without losing qualityTruly lossless image compression saves about 20%. Losing nothing you can actually see saves about 80% — and those are two completely different operations.6 min read
- Compressing a PDF for an online formPortals demand documents under 100KB, 200KB or 500KB and reject anything over without saying by how much. Here is how to hit the number and keep it readable.6 min read
- Compressing a PDF without AcrobatAcrobat's "Reduce File Size" is three presets with no target field. Here is what those presets do, and how to get the same result without a subscription.5 min read
- Compressing a video for DiscordDiscord's free limit went to 20MB, but the rollout was uneven and some accounts still see 10MB. Here is how to pick a target that actually uploads.5 min read