Image tools
Compress Image Online Free
Make JPG, PNG and WebP images smaller for email, websites and upload forms. Choose a quality level, compress several images at once and download the results. Everything happens in your browser, so your images never leave your device.
- Runs in your browser
- No upload
- Free, no signup
Settings
Lower quality means smaller files. 70 to 85 suits most photos.
PNG files only get much smaller as WebP or JPG.
Only images wider than this are made smaller.
How to compress Image
Add your images
Drop JPG, PNG or WebP images onto the page, or click to choose them. You can add several at once.
Choose quality and format
Move the quality slider, or set a maximum width to shrink large photos further. Keep the original format, or switch to WebP or JPG for smaller files.
Compress
Click "Compress images". Each image shows its old size, new size and how much was saved.
Download
Download images one by one, or all together as a ZIP file.
Why use PDF Lab's Compress Image tool?
Private by design
Compression runs in your browser. Your images are never uploaded to a server.
Quality control
A quality slider lets you balance file size against sharpness.
Batch compression
Compress many images in one go and download them as a ZIP.
Never bigger
If compression would make an image larger, you get the original back unchanged.
Optional resizing
Set a maximum width to make large photos much smaller.
Free, no signup
No account, watermark or usage limit.
Frequently asked questions
How do I compress an image without losing quality?
Keep the quality between 70 and 85. At these levels most photos look the same to the eye but are much smaller. If the image is also much larger than it will be displayed, set a maximum width; that usually saves more than lowering the quality.
Why didn't my PNG get smaller?
PNG is a lossless format, so re-saving it rarely makes it smaller. Choose WebP (keeps transparency) or JPG as the output format to reduce its size a lot. If an image would get larger, the tool keeps your original.
Are my images uploaded?
No. Compression happens in your browser on your own device. Nothing is sent to our server.
How many images can I compress at once?
There is no fixed limit. Very large batches depend on your device's memory, so for hundreds of photos it is quicker to work in groups.
What is the best format for small images?
WebP usually gives the smallest files at the same quality and is supported by all modern browsers. JPG is the most widely supported for photos. PNG is best for screenshots and graphics that need sharp edges.