Compress Images
Reduce image file size while maintaining visual quality.
By Syed Mubashir Ali · Last updated
Reduce photo size in KB for forms and uploads
Government portals, job sites and exam forms often ask for a photo or signature under a fixed size, such as 20 KB, 50 KB or 200 KB. Switch to 'To a target size', enter the limit in KB or pick 50, 100, 200, 500 KB or 1 MB, and add your images. For each one the compressor finds the highest JPEG or WebP quality that fits, and only reduces the pixel dimensions if even low quality is still too big, so the photo stays as sharp as the limit allows.
PNG has no quality setting, so a PNG is made smaller by reducing its dimensions; convert it to JPEG or WebP first if you need to keep its size. Photos full of fine detail, like foliage or crowds, need more bytes than plain backgrounds, so a large phone photo may have its dimensions reduced to fit a small limit. You can compress several images at once and download them together as a ZIP, and they never leave your device.
How to Use Image Compressor
- 1Drag and drop your images onto the upload area, click to browse, or paste a screenshot with Ctrl+V. Add as many as you like.
- 2Pick a mode: 'By quality' (a slider, 75% is a good balance) or 'To a target size', for a form that only accepts files under, say, 200 KB.
- 3Optionally choose an output format (same as original, JPG, WebP or PNG) and a maximum width/height. Leave it empty to keep the original size.
- 4Click 'Compress', check any result against the original with the comparison slider, and save files one by one or all together as a ZIP.
Frequently Asked Questions
How much will my images be compressed?
It depends on the image and the setting. Phone photos saved as JPG or WebP typically shrink 40–80% at 70–80% quality. PNG is lossless, so the quality setting can't shrink it much; for big savings convert it to WebP (which keeps transparency) or JPG. If re-encoding would make a file bigger, the original is kept and labelled 'already optimised'.
What quality setting should I use?
For the web, 75–85% is usually indistinguishable from the original. For printing use 90% or more. For thumbnails 60–70% is fine. Use the comparison slider to check before you download.
Can I compress to an exact file size?
Yes. 'To a target size' lowers the quality step by step until the file fits, and only shrinks the dimensions if quality alone can't get there: the result says when that happened. It's useful for job portals, university applications and government forms with an upload limit.
Does compression change the image dimensions?
Not unless you ask it to. The maximum width/height box is empty by default, which keeps every image at its original size. The only exception is target-size mode, when a very small target can't be reached any other way.
Which formats are supported?
JPG, PNG, WebP, GIF and BMP in, as many at once as you like. By default JPG stays JPG, WebP stays WebP and PNG stays PNG. Browsers can't write GIF or BMP, so those come out as PNG with a .png extension, and an animated GIF keeps only its first frame. Location and camera details (EXIF) are removed.
Are my photos uploaded to a server?
No. Compression runs entirely in your browser using the built-in canvas encoder, so your images never leave your device.
About Image Compressor
The Image Compressor reduces the file size of photos and graphics without visible quality loss. Smaller images load faster, take less storage, and are quicker to send by email or WhatsApp, and many upload forms simply refuse files over a limit.
Each image is decoded upright (phone photos keep their correct orientation) and re-encoded by your browser at the quality you choose. Nothing about the image's size changes unless you ask for it: the old behaviour of quietly shrinking large photos to 1920 px is gone.
Target-size mode is built for forms with an upload limit. It searches for the highest quality that fits your target and only reduces the dimensions, in small steps, if even low quality is still too big. Each result shows its final size and dimensions, and a comparison slider lets you check the difference before downloading.
For the biggest savings choose WebP: it is typically 25–35% smaller than JPG at the same visual quality and, unlike JPG, keeps transparency. One damaged file never stops the rest of a batch, and everything can be downloaded at once as a ZIP.