Image Compressor — Reduce File Size Free Online
Compress images online free without losing quality — no sign-up, no email, no uploads. Reduce JPG, PNG and WEBP file sizes by up to 80% entirely in your browser.
Last updated: June 2026
Drop an image here or click to upload
JPG, PNG, WebP · max 20 MB · processed in your browser
Output format
Lower quality = smaller file. 80% is a good balance for most photos.
About this tool
How to compress an image online
Large image files are a constant friction: they make web pages load slowly, get rejected by upload forms, and clog up email. An image compressor fixes that by re-encoding the picture at a smaller file size, so it's quicker to share and store without you having to recreate it.
To compress an image here, drop it into the box and choose a format and quality. WebP is the modern choice — it typically produces the smallest file at a given quality and keeps transparency. JPEG is the most universally compatible format for photographs, and PNG stays lossless for graphics, logos and screenshots. The quality slider controls how aggressively lossy formats are compressed; around 80% is visually identical to the original for most photos while cutting the file size dramatically.
Everything happens locally in your browser, so your image is never uploaded and there's no upload-and-wait round trip. When compression finishes you'll see the original size, the new size, and the exact percentage you saved, with a live preview and a one-click download. Pair it with the image resizer to reduce dimensions first for even smaller files. There are no watermarks, no account, and no daily limit.
How it works
Three quick steps — no account, nothing uploaded to a server.
Upload your image
JPG, PNG and WebP supported. Up to 20 MB.
Set quality and format
Choose WebP, JPEG or PNG and dial in the quality you need.
Download your result
Processed locally in your browser. Nothing is uploaded to our servers.
FAQ
Frequently asked questions
How do I compress an image without losing quality?
Choose WebP or JPEG and keep the quality slider high (around 80–90%). At that range the file is much smaller while looking visually identical to the original for most photos. WebP usually gives the smallest file at a given quality. For graphics with sharp edges or transparency, use PNG to stay lossless.
Which format makes the smallest file?
WebP almost always produces the smallest file for photos at the same visual quality, often 25–35% smaller than JPEG. JPEG is the most compatible everywhere. PNG is lossless and best for logos, screenshots and images with transparency, but its files are larger.
Is the image compressor free?
Completely. There's no account, no watermark and no limit. The compressor runs in your browser, so you can compress as many images as you want and nothing is uploaded to a server.
Will JPEG ruin my transparent PNG?
JPEG has no transparency, so transparent areas are filled with white when you export to JPEG. If you need to keep transparency, choose WebP or PNG instead — both preserve the alpha channel.
What's the largest image I can compress?
Up to 20MB per image. Compression uses your device's memory, so very large images may be slower on older phones, but most photos are comfortably under the limit. You'll see a warning if a file is too big.
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