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Increase or decrease any image to an exact KB or MB file size. Free, instant, no signup.
More than 2M+ users trust us
No learning curve. No complex settings. Just upload and go.
Built for results, not for tinkering β every mode is tuned for a specific challenge.
Compress a heavy photo down to a few hundred KB to slip under an upload cap.
Pad a small image up to a required minimum size when a form demands it.
The output lands on the precise KB or MB value you ask for, not just close.
No credits, no watermark, no account. Just upload, set a target and download.
From casual edits to professional workflows β here is what people say.
"A government form needed my photo under 200 KB. Set the target, downloaded, uploaded, done in 20 seconds."
Ravi S.
@ravi.apply
"A portal kept rejecting my image for being too small. The increase option fixed it instantly."
Tariq H.
@tariq.docs
"Finally a converter that hits the exact size I type instead of getting close. Use it before every upload."
Olena M.
@olena.web
AI Tools
AIEnhance.io is a full AI photo toolkit β generate, upscale, edit and retouch all in one place.
Need more quality, not a smaller file? Convert to 4Γ HD instead.
Sharpen a soft photo before resizing it for upload.
Fix lighting and color before exporting at your target size.
Remove the background and export a clean transparent PNG. Free, no signup.
AIEnhance.io is a free KB to MB converter that changes the file size of any image to an exact target. Upload a photo, type the size you need in KB or MB, and the tool compresses or expands the file to match. Then you download a file at precisely that size.
There is nothing to install and no signup. It runs in your browser the same way on a Macbook, a Windows laptop, an iPhone or an Android. Upload, set a target, download. That is the entire interaction.
Most file-size tools only compress. This one works both ways, which covers the two real reasons people search for a KB to MB converter:
Set a target smaller than the current size and the tool compresses by lowering quality and, if needed, dimensions. Set a larger target and it pads the file up to the exact size. Either way the result matches the number you typed.
File size limits show up everywhere: job application forms that cap a CV photo at 500 KB, government portals that demand a document image between a minimum and maximum size, marketplaces that reject oversized product shots, and email attachments that bounce when they are too large.
Resizing the image by hand means guessing at quality settings in an editor and exporting over and over until you land near the limit. This tool removes the guesswork. You name the size and it hits it exactly, in one step, for free.
There are no credits and no watermark on this tool. Your image is processed on our Railway infrastructure and discarded immediately after the resized file is returned. No copies are kept and nothing is used for training.
The output downloads straight to your device as a standard JPEG, ready to upload anywhere the original was too large or too small.
Everything you need to know before you get started.