Image compressor
Image Compressor – Reduce JPG, PNG and WebP File Size. No watermark added by QuickConvertOnline. Free, no account needed.
About Image compressor
The image compressor makes image files smaller by re-encoding them at a quality level you choose. A side-by-side preview and the percentage saving show exactly what you gain and what changes, so you can find the lowest size that still looks right before downloading.
It is ideal for shrinking photos for email, websites, forms with upload limits and chat apps. Compress up to 20 images at once, keep their format or switch to JPG, WebP, PNG or AVIF, and download everything as a ZIP. Compression runs in your browser, so nothing is uploaded.
How to use Image compressor
- Drop images onto the upload box, click Choose image, or paste from the clipboard.
- Choose an output format; JPG is selected by default, and Original keeps each file’s format.
- Lower the Quality slider and compare the Result preview and file size with the original.
- Click Download for a single image, or Download ZIP for a batch.
Features
- Quality slider from 5% to 100%, starting at 82%.
- Output as JPG, WebP, PNG or AVIF (browser-dependent), or keep the original format.
- Shows the size before and after and the percentage saved for each image.
- If the compressed file in the same format would be larger, your original file is kept instead.
- Batch compression of up to 20 images, 100 MB in total, with a ZIP download.
Common uses
- Getting photos under the size limit of an email attachment or application form.
- Speeding up a website by shrinking heavy images.
- Saving storage space before archiving a large set of pictures.
- Sending images faster over a slow or metered connection.
Tips
- For transparent images, choose WebP; JPG replaces transparency with white.
- If the file is still too big, reduce its dimensions with the image resizer as well.
Frequently asked questions
How much can I compress an image without visible quality loss?
It depends on the image. Busy, detailed photos hide compression well, while smooth skies, gradients and text show it sooner. Lower the slider step by step and compare the preview with the original; stop when you begin to see blur, banding or blocky areas.
Why didn’t my PNG get smaller?
PNG is lossless, so there is no quality setting and re-saving often gives a similar size. For a real reduction, switch the output to WebP, which keeps transparency, or JPG for photos without transparency.
Why is the result the same size as my original?
When compressing in the same format would make the file larger, for example with an already optimized JPG, the tool keeps your original file instead of giving you a worse one. Try a lower quality or a different format.
Does compression change the image dimensions?
No. The width and height stay the same; only the encoding changes. To reduce the size further by making the image smaller, use the image resizer, which also has a quality setting.
Should I compress to JPG or WebP?
WebP is usually smaller at similar quality and supports transparency, and all modern browsers display it. JPG is the safer choice for email, printing and older software. Try both and compare the result sizes.
Is my input uploaded?
Tools run in your browser. Files, text and results are not uploaded to our servers and are cleared when you leave the tool.
Your privacy comes first
Tools run in your browser. Files, text and results are not uploaded to our servers and are cleared when you leave the tool.