Image Compressor
Reduce image file size without visible quality loss. Runs entirely in your browser — your photo never leaves your device.
Free forever
No upload — runs in browser
No signup
JPG, PNG, WebP
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Drop your image here
Supports JPG, PNG, WebP — up to 10MB
Or drag & drop anywhere on this box
How does the image compressor work?
Unlike most online tools, our compressor runs entirely inside your browser using the HTML5 Canvas API. Your image is never uploaded to any server — it stays on your device throughout the entire process. This means it works even offline, and there are no privacy concerns.
We redraw your image at the quality level you choose and encode it as JPG or WebP. For PNG files, JPG compression typically reduces file size by 60–80%. WebP produces the smallest files with the best quality-to-size ratio and is supported by all modern browsers.
FAQ
Image Compression — Frequently Asked Questions
Everything you need to know about our free image compressor.
How It Works
The tool redraws your image onto an HTML5 Canvas and re-encodes it at the quality level you choose, all inside your browser. There's no server upload involved — the compression happens locally on your device using the same technology built into every modern web browser.
Typical reductions range from 60–80% depending on the source format and quality setting. Converting a large PNG photo to JPG at 80% quality often produces the biggest single reduction, since PNG's lossless compression is far less efficient for photographs than JPG or WebP.
At the default 80% quality setting, the drop in visual quality is generally imperceptible to the human eye, even zoomed in. Quality settings below about 50% start to introduce visible compression artefacts, especially around sharp edges and fine text.
We recommend 80% as the default — it's visually identical to the original for almost all photos while cutting file size significantly. Drop to 60–70% if you need smaller files for a slow-loading website, or push toward 95–100% for print work where every detail matters.
The tool currently processes one image at a time so you can preview the before/after result and adjust quality before downloading. Each image only takes a few seconds, so compressing a handful of photos in sequence is quick.
Quality & Formats
You can upload JPG, PNG, and WebP images and export the result as JPG, PNG, or WebP — you don't need to keep the original format. This makes it easy to convert a large PNG screenshot into a compact JPG or WebP in one step.
WebP consistently produces the smallest files at equivalent visual quality — typically 25–35% smaller than JPG. If you need maximum browser compatibility (older devices, some email clients), JPG is still the safer default.
Yes — select JPG as the output format regardless of your upload format. This is the single most effective way to shrink a large PNG photo, since JPG's lossy compression is far more efficient for photographic content. Note that JPG doesn't support transparency, so this isn't suitable for logos with a transparent background.
No. Compression only affects encoding quality, not pixel dimensions — your image stays exactly the same width and height. If you also need to change the dimensions, use our Image Resizer before or after compressing.
The maximum upload size is 10MB. Since processing happens in your browser rather than on a server, the practical limit is really your device's available memory — very large images (e.g. 40+ megapixels) may take a moment longer to process.
Free & Limits
Yes — completely free, with no account, no sign-up, and no watermarks. Compress as many images as you like.
There's no daily limit. Because compression runs in your own browser rather than on our server, you can process as many images as you want without any usage cap.
No account is required. Just upload an image, adjust the quality slider, and download — no sign-up, no email address needed.
Privacy & Safety
No. Unlike our background remover, image compression runs entirely inside your browser using the Canvas API. Your image is never transmitted anywhere — it never leaves your device.
Yes — since nothing is uploaded, there's no server-side storage or transmission of your images to worry about. This makes the tool suitable for sensitive or confidential images, including unreleased product photography. See our Privacy Policy for details.
Yes — the tool works on iOS, Android, and desktop browsers. No app download needed. You can compress a photo straight from your camera roll.
Use Cases
Upload your image, choose WebP as the output format for the smallest file size, and keep quality around 75–85%. Smaller image files mean faster page loads, which improves both user experience and Google's Core Web Vitals score for your site.
Choose JPG for maximum compatibility with email clients, and set quality to 70–80%. This typically brings a multi-megabyte photo down to a few hundred KB, well under most attachment size limits.
Most platforms re-compress images on upload anyway, so a moderate quality setting (75–85%) in JPG is usually plenty. If you need exact pixel dimensions for a specific platform (like Instagram's 1080×1080 square), use our Image Resizer first.
For print, keep quality at 95–100%. The file size reduction will be smaller, but visible artefacts will be avoided even at large print sizes. Compression never adds resolution, so start from the highest-resolution original you have.
Troubleshooting
If the "after" size looks larger, you may have selected PNG as the output for a photo — PNG's lossless compression is often less efficient than JPG or WebP for photographic content. Switch to JPG or WebP for the biggest reduction.
This means the quality setting is too low for that image. Move the quality slider higher — results update live so you can find the point where file size drops without visible softness. Text and sharp graphic edges show artefacts sooner than photos do.
Make sure your browser allows downloads from the site (check for a blocked pop-up icon in the address bar). If the problem persists, try a different browser — the tool uses standard browser APIs that work in all current versions of Chrome, Safari, Firefox, and Edge.