Image Compressor — Shrink JPEG & WebP Online
Compress JPEG and WebP images with an adjustable quality slider. See the file-size savings and download — all in your browser, never uploaded.
🔒 Runs entirely in your browser. Your input and output are never sent to a server or stored — fully private.
🔒 Images are compressed in your browser and never uploaded.
About this tool
Need to shrink a photo for email, a web page or an upload limit? This image compressor re-encodes your picture as a smaller JPEG or WebP, with a quality slider so you decide the exact balance between size and sharpness — and it reports how many kilobytes you saved. Everything runs on an HTML canvas inside your browser, which means your photo is never uploaded to a server: the compression is 100% local, so even sensitive images stay entirely on your own device.
Frequently asked questions
Should I compress to JPEG or WebP?
Both are lossy formats that shrink files by discarding detail your eye barely notices. WebP usually produces a noticeably smaller file at the same visual quality and is supported by every modern browser, so it is the best default for the web. Choose JPEG when you need the widest possible compatibility — for older software or when you are unsure what will open the file. The quality slider works for both.
What quality setting should I use?
A setting around 75 to 85 percent is the sweet spot for most photos: the file shrinks dramatically while the result still looks identical to the original at normal viewing size. Go lower only when a small file matters more than fine detail, since heavy compression can add blocky artefacts around edges. There is no single right answer, so watch the live size readout and the preview and stop when the balance looks right to you.
Is my image uploaded to compress it?
No. The whole process runs in your browser using a canvas, so your image is read, re-encoded and saved entirely on your own device. Nothing is sent to or stored on any server, which makes the tool safe for private photos, ID scans or work documents. Because there is no upload-and-download round trip, compression is also instant, even for large files.