Compress Images Online — Free, No Upload
Drop in an image, choose how hard to squeeze it, and download the smaller file. Compression happens on your device using the browser's own image encoder — the file never leaves your computer, so there is no upload wait and nothing to delete afterwards.
Drop images here or browse
JPG, PNG, WebP · multiple files OK · nothing is uploaded
Lower = smaller file. 70–80% is usually indistinguishable from the original.
Resizing is the single biggest win. Most photos are far bigger than they need to be.
WebP is supported by every current browser and typically 25–35% smaller than JPEG.
How much smaller can you actually get?
For photographs, a realistic expectation is 60–85% smaller with no visible difference, and most of that saving comes from resizing rather than from the quality slider. A photo straight off a phone is often 4000 px wide; a blog post displays it at 800 px. You are sending five times more pixels than anyone will ever see.
Screenshots and graphics with flat colour behave differently. They are usually PNGs, and converting them to lossy WebP can create fuzzy halos around text. If your image is mostly text or sharp lines, keep quality at 90% or higher and check the result before you ship it.
Which format should you choose?
- WebP — the default here, and the right answer almost every time. It is 25–35% smaller than JPEG at the same visual quality, and every browser released in the last several years supports it.
- JPEG — pick this when the file has to work somewhere old or unpredictable: an email attachment, a print shop, a legacy CMS, or a form that rejects anything but
.jpg.
Note that PNG output is not offered on purpose. PNG is lossless, so re-encoding a photo as PNG usually makes it bigger. If you need transparency, WebP handles it and stays small.
Why compressing images matters
Image weight is the most common cause of a slow page. Google's Core Web Vitals measure Largest Contentful Paint — how long the biggest visible element takes to appear — and on a typical page that element is an image. Cutting a 3 MB hero image to 200 KB often moves a page from "failing" to "good" on its own, with no other changes.
It also just costs less. If you pay for bandwidth, images are usually the majority of it.
Is this private?
Yes, in the literal sense that there is no server involved. The compression uses the <canvas> element built into your browser. You can verify this yourself: open your browser's developer tools, switch to the Network tab, and compress a file. You will see no upload request. You can even disconnect from the internet after the page loads and it will keep working.
Frequently asked questions
Are my images uploaded to a server?
No. Compression runs entirely in your browser using the canvas API. The file never leaves your device, which is why it works even if you disconnect from the internet after the page has loaded.
Is there a file size limit?
There is no limit imposed by the tool, but very large images (roughly above 50 megapixels) can exhaust the memory a browser tab is allowed to use, especially on phones. If a file fails, try resizing it to a smaller max width.
Why did my file get bigger instead of smaller?
This happens when the original was already heavily compressed, or when a simple graphic that was an efficient PNG is re-encoded as a lossy format. If you see "no gain", the original is already the better file — keep it.
Does compressing an image lose quality?
JPEG and WebP are lossy formats, so some information is discarded. At 70–80% quality the difference is invisible at normal viewing size for photographs. Compression is not reversible, so always keep your originals.
Can I compress several images at once?
Yes. Drop in as many as you like and they are processed in parallel with the same settings. Each one gets its own download button, and the summary shows the total saving across the batch.
Last updated September 19, 2026