Are my images uploaded to a server?

No. Compression happens entirely in your browser using the canvas API. Your images never leave your computer, which makes it safe for private photos and documents.

Which formats can I compress?

JPG/JPEG, PNG and WebP. You can also convert between them — for example turn a large PNG into a much smaller WebP or JPEG.

Yes, it is free and there is no account or upload limit. The page shows a small ad; a one-time $9 unlock removes it.

How do I make an image a smaller file size?

Lower the quality slider and, if the image is larger than you need, set a maximum width to resize it. Converting a PNG photo to JPEG or WebP usually gives the biggest saving.

Compress images in your browser

Shrink JPG, PNG and WebP files — resize and convert format too. Everything happens on your computer; your images are never uploaded. Free, no account.

Drop images here

or click to choose files · JPG · PNG · WebP · batch is fine

Choose images

Quality 75

Max width (px)

Output format

How it works

Pick one or more images (or drag them onto the box). The tool reads each file, redraws it on a canvas at the quality and size you choose, and re-encodes it. You get the smaller file back to download. Because all of this runs in your browser, the original never leaves your machine — there is no server and nothing is uploaded.

Getting the smallest file

Lower the quality. For photos, 70–80 is usually indistinguishable from the original at a fraction of the size.

Resize if it's huge. A 6000px-wide phone photo is overkill for a website. Set a max width (1600–2000px is plenty for most web use) and the file drops sharply.

Convert the format. A photo saved as PNG is enormous — switch it to JPEG or WebP for a big saving. Keep PNG only when you need a transparent background (WebP also supports transparency and is smaller).

Which format should I pick?

JPEG is the safe default for photos and gives the smallest files. WebP is usually 25–35% smaller than JPEG at the same quality and supports transparency, but a few very old apps don't open it. PNG is lossless — best for screenshots, logos and anything with sharp edges or transparency, but the worst choice for photos.

Need a PDF instead of an image?

If you're preparing a document, our sister tool turns Markdown into a clean PDF in the browser — same idea, nothing uploaded. Try Markdown → PDF →

Frequently asked questions

Are my images uploaded anywhere?

No. Everything is processed locally in your browser. Your images never leave your computer.

Is there a file size or count limit?

No hard limit — it's bounded only by your device's memory. Very large batches of huge images may be slow on a phone.

Why did my PNG barely get smaller?

PNG is lossless, so the quality slider doesn't apply to it. To shrink a PNG photo, convert it to JPEG or WebP, or resize it with a max width.

Does it keep transparency?

Yes, if you output to PNG or WebP. JPEG has no transparency, so transparent areas are filled with white.

Is it really free?

Yes. There's one small ad on the page; a one-time $9 unlock removes it if you'd rather not see it.