Reduce image size
Drop a photo, pick a target — 20 KB, 50 KB, 100 KB, 200 KB or your own number — and download the smaller file. You can also reduce by pixel dimensions or by percentage.
Runs in your browser — your image is never uploaded.1 · Your image
Drop an image here
or click to choose · or paste with Ctrl + V
2 · How much smaller
3 · Result
Load an image and the compressed result will appear here, with the before-and-after file size.
Reduce image size without losing the picture
Most upload forms do not ask for a smaller picture — they ask for a smaller file. That is a different problem. Cutting pixels is one way to get there; throwing away detail the eye will not miss is usually a better one. This page gives you both, plus a third: name the file size you need and let the tool work backwards to it.
Everything happens inside this tab. No file is sent anywhere, there is no queue, and there is nothing to sign up for.
By target file size
Type or tap the size you need — 20 KB, 50 KB, 100 KB, 200 KB, or any number. The tool searches for the best quality it can find that still lands at or under it. This is the mode to use for a form that rejects your photo for being too large.
By pixel size
Set a width, a height, or both. Useful when a page demands a specific dimension, and it is also the honest way to shrink a lossless PNG, where the only lever is the number of pixels.
By percentage
Halve it, quarter it, or any other scale. The quickest option when you only know the picture needs to be "a lot smaller" and do not care about the exact figure.
Supported input and output formats
The table below is not a claim — it is what this browser reports, measured on this page when it loaded. Input is whatever your browser can decode; output is whatever it can encode.
| Format | Typical extensions | This browser can read it |
|---|---|---|
| Measuring… | ||
Output formats offered: JPEG, PNG and WebP. Those are the three a browser can encode. If your source file is a GIF, BMP, TIFF or HEIC, the page will write one of those three instead and say so.
How the target-size mode works
It is a short search, not a guess. The page encodes your image once at a preferred quality and looks at the result. If that already fits under your number it spends a couple more encodes raising the quality to use up the headroom. If it does not fit, it buys the space with pixels first — file size tracks pixel count closely, so one step lands near the target — and only lowers quality when the pixel size cannot come down any further.
There is a floor under all of it: 78% quality is what the page aims to keep. Hitting 100 KB by dropping a 6-megapixel photo to 4% quality produces a file that satisfies the form and looks like mud, so a 1100 px picture at decent quality is preferred over a 3000 px smear. Untick the box under the size chips if you would rather keep every pixel and let the quality fall instead.
The search is deliberately short — a handful of encodes, not dozens. Encoding is the slow part, and a page that takes twenty seconds is worse than one that lands a few percent off the ideal.
Two honest limits, both of which the result panel will tell you about:
- If even the lowest quality is too big, the image is also scaled down, and the result panel says to what.
- PNG is lossless, so there is no quality dial to turn. In target-size mode with PNG output, the page reduces the pixel dimensions instead, and tells you the final size it reached.
Why the result is sometimes larger than the original
A JPEG that is already heavily compressed cannot be made smaller without either visible damage or fewer pixels. If the tool's output is bigger than what you started with, use the original file — the result panel flags this instead of hiding it.
Frequently asked
How do I reduce an image to 100 KB?
Drop the image, leave the mode on Target file size, tap 100 KB, and download. If you need a different figure — 20 KB, 50 KB, 200 KB, or something a form specified — type it into the custom field.
Is this image resizer free, and do I need an account?
It is free and there is no account. No sign-up, no email, no paywall, no watermark, and no limit on how many times you use it. The page is a single file that runs locally, so there is no service to meter you against.
Are my images uploaded to a server?
No. The file is read by your own browser and never leaves the device. There is no upload step in the code, and the page works with the network disconnected after it has loaded.
Can I resize an image online on a phone?
Yes. The layout is built for a phone first — the drop area, the size chips and the buttons all sit within thumb reach, and the result never overflows the screen sideways.
What is the difference between a photo resizer and an image size converter?
A photo resizer changes the pixel dimensions. A photo size converter — or image size converter — changes the file size, and often the format with it. This page does both in one place: resize by pixels or percentage, reduce by target file size, and save the result as JPEG, PNG or WebP.
Can it convert between formats?
Yes, for the three formats a browser can write: JPEG, PNG and WebP. Leave Save as on "Keep the original format", or pick one explicitly to convert. Transparency is preserved in PNG and WebP; a JPEG has no alpha channel, so the page fills the background white rather than leaving it black.
Can it reduce a HEIC or TIFF file?
Only if your browser can decode it, and most desktop browsers cannot — the format table above shows what this browser reported. The file picker will accept those files so you can try, and if the decode fails the page says so plainly rather than producing a broken image. Converting HEIC to JPEG once in your phone's camera settings is usually the fastest fix.
Can it reduce an animated GIF?
The image is read from the first frame, so the result is a still image. Browsers have no GIF encoder, so an animated result cannot be written here — that is a limit of the platform, not a setting.
Does reducing the file size always reduce quality?
Not necessarily. Downscaling to the size the picture is actually displayed at often loses nothing you can see, and it is the safest kind of reduction. Re-compressing at a lower quality does discard detail — the preview and the before-and-after numbers are there so you can judge it yourself before downloading.