How to Compress Images
Large photos are slow to upload, hit attachment limits and slow down websites. Most of the saving comes from two decisions: how many pixels the image really needs, and how much compression it can take before anyone notices.
Open Image CompressorStep by step
Open the Image Compressor
It works with JPG, PNG and WebP images, up to 20 at a time. Images are processed in your browser.
Add your images
Drop them on the upload area or choose them with the file picker.
Choose a format and quality
JPG suits photos; WebP is usually smaller still. A quality of 70–80 is a good starting point for photos you will view on a screen.
Set a maximum size if the image is large
Enter a value for “Longest side”, for example 1600 pixels for email or 2000 for a website. This often saves more than lowering quality.
Compress and compare
Each result shows the old and new size. If a file didn’t get smaller, TextVix says so — keep the original in that case. Download files one by one or all together as a ZIP.
Resize first
A 12-megapixel phone photo is about 4000 × 3000 pixels. Shown on a website at 1200 pixels wide, most of those pixels are thrown away by the browser anyway. Halving both sides leaves a quarter of the pixels — and roughly a quarter of the file size — with no visible difference at that display size.
Then pick a quality
Lossy formats let you trade detail for size. Below about 60, artefacts start to show around edges and in smooth skies; above 90, files grow quickly for little visible gain. Try a few settings on one image and compare it with the original at the size it will actually be viewed.
Screenshots and graphics
PNG screenshots can’t be made smaller by lowering quality, because PNG is lossless. Saving a screenshot as JPG often makes text look smudgy; WebP usually handles text better at small sizes. For screenshots, reducing the dimensions is the safest way to shrink them.
Try Image Compressor
Make JPG, PNG and WebP images smaller by re-saving them at a lower quality.
Frequently asked questions
Will compression remove transparency?
Saving as JPG does — transparent areas get a background colour. WebP keeps transparency.
Can I compress the same image twice?
You can, but each lossy save loses a little more detail. Compress from the original whenever you can.
Are my photos uploaded?
No. Compression runs in your browser; your images stay on your device.