Compress Image to 25KB
Drop in an image and get it back at 25 KB or less, with the target already set and the result measured, not estimated.
Drop an image to compress it to 25 KB
JPG, PNG or WebP, up to 25 MB. Compressed in your browser, never uploaded.
The most forgiving
of the small sizes
25 KB is the point where a compressed photo stops looking compressed to most people. Below it you start trading away faces; above it you are past what many upload forms will accept. It is the size worth trying first when a form gives you a range.
Other sizes and settings
Same compressor, different target. Each one opens with its number already set.
Tools that pair well with this one
All free, all in your browser, no signup.
How to compress an image to 25 KB
Three steps, all of them in this browser tab. Nothing is uploaded to a server, so the 25 KB file you end up with never leaves your device.
Add your image
Drag a JPG, PNG or WebP onto the drop area above, or click to pick one. Files up to 25 MB are fine.
Confirm the 25 KB target
25 KB is already selected, so there is nothing to set. Type a different number if your form asked for one.
Compress and download
Press Compress, check the size it actually reached, and download. You will see the original and the 25 KB version side by side first.
The short answer
Why 25KB is the size to aim for when you have a choice
Because it sits right on the line where the compression stops being obvious, and most forms that cap uploads allow it.
Between roughly 20 KB and 30 KB something useful happens to a well-cropped photograph: the blocking that is clearly visible at 15 KB stops being noticeable at normal viewing size. Below that band you are managing damage. Above it you are mostly buying detail nobody looks at.
That makes 25 KB the sensible default when a form gives you a range like "under 50 KB" or "between 20 KB and 50 KB". You get a file that is comfortably inside the limit with room to spare if the form measures slightly differently than you do, and you have not given up anything visible to get there.
It is also this tool's own default target, for the same reason. If you arrived here without a specific number in mind, this is the page you want.
Getting it right
What 25KB looks like on different kinds of image
The same number produces very different results depending on what you feed it, and knowing which case you are in saves a lot of retrying.
Photographs of people do well. A cropped headshot at 25 KB holds skin tone, eye detail and hair edges convincingly. This is the case the number is really designed around.
Screenshots and images containing text do badly, and this surprises people. Text is high-contrast edges everywhere, which is the most expensive thing a lossy encoder can store, so a screenshot at 25 KB often comes back with visibly fuzzy lettering. If your image is mostly text, keep it as a PNG and let this tool reduce its colour count instead, which stays sharp because it never touches the edges.
Illustrations, logos and anything with flat colour are the easy case. They frequently land under 25 KB losslessly, meaning the file gets smaller and nothing at all is lost.
Formats
JPG vs PNG vs WebP at 25 KB
The same 25 KB target produces three different outcomes depending on what you upload, because the three formats get there by different means.
| Format | How it reaches 25 KB | How it holds up |
|---|---|---|
| JPG | Encoder quality is lowered until the file fits | Tight. A cropped face survives, a busy scene does not. |
| PNG | Colour count is reduced and the file rewritten | Only for flat art and screenshots. A PNG photo will struggle. |
| WebP | Encoder quality is lowered, more efficiently than JPG | Usually the best looking of the three at 25 KB. |
If your image is a photograph and it is already a JPG or WebP, 25 KB is a straightforward ask. If it is a PNG photograph, converting it to JPG first will get you a better looking result at 25 KB than compressing it as a PNG will.
Pick a size
25 KB vs 15 KB vs 20 KB
If the number you were given is not 25 KB, one of these is. Each opens the same tool with its own target already set.
The quality difference between neighbouring sizes is much larger at the small end than at the large end. Going from 15 KB to 30 KB transforms a photograph. Going from 200 KB to 500 KB is barely visible on most images. That is worth knowing if you have any choice about which limit to work to.
What the 25 KB compressor does for you
Everything below happens on your own device, in the time it takes to read this line.
Lands under 25 KB
The tool searches for the highest quality whose output still fits under 25 KB, then tells you the size it reached.
Your format, kept
A PNG comes back a PNG, a JPG comes back a JPG. We never convert your file to get a better number.
Nothing leaves your device
The work runs in your browser. No upload, no queue, no copy of your image on anyone's server.
See the saving before you keep it
Original and result side by side, with both exact sizes and the percentage saved, before you download anything.
Works on a phone
The whole tool runs in a mobile browser, which matters when the photo you need to shrink is already on your phone.
Free, with no account
No signup, no watermark and no daily cap. Compress as many files as you need.
Compressing to 25 KB: common questions
What people ask before and after they hit the 25 KB button.
It clears the large majority of them. Caps of 50 KB, 100 KB and 200 KB are all common, and 25 KB sits comfortably under every one of those with margin left over.
The forms it will not clear are the ones asking for signatures or thumbnails in the 10 to 20 KB range. If yours is one of those, use the 15 KB or 20 KB page instead.
Because lossy compression is built for photographs, and a screenshot is the opposite of a photograph. Photos are made of gradual tonal changes, which compress beautifully. Screenshots are made of hard edges and flat blocks with text on top, and hard edges are the most expensive thing to encode.
Keep screenshots as PNG. This tool shrinks a PNG by reducing how many colours it uses rather than by blurring the pixels, so the text stays crisp. A screenshot with a small palette can drop a long way in size with no visible change at all.
No. The pixel width and height stay exactly what they were, and so does the file format. A 3000 by 2000 JPG comes back as a 3000 by 2000 JPG that happens to weigh 25 KB.
That is deliberate. If you need different dimensions, that is a resize rather than a compress, and doing both at once would hide which of the two caused a change you did not want.
No. The compression runs inside your browser, using the canvas your browser already ships with. Your file is read from your own device, processed in memory, and handed straight back to you.
Nothing is transmitted, which means nothing can be stored, logged or leaked. It also means the tool keeps working if your connection drops halfway through.
Free, with no watermark, no account and no daily limit. Compressing to 25 KB costs you nothing and produces a clean file.
There is nothing to sign up for because there is no server doing the work. The tool is the page you are already on.
JPG (and JPEG, which is the same format), PNG and WebP, at up to 25 MB per file. Your file comes back in the format you gave it.
HEIC from an iPhone, AVIF and GIF are not supported yet. If your photo is a HEIC, exporting it as a JPG first will let you compress it here.
25 KB, measured rather than promised
Drop an image in and see the actual output size before you download it.