Increase JPG File Size to 100KB Free
This free tool increases a JPG image to exactly 100KB by padding it with invisible data, without changing how the image looks. Choose your file, select 100KB, and download the result — no signup, and no file is uploaded to a server.
Increase JPG or JPEG file size
Runs entirely in this browser tab. Your file is never uploaded.
Drag a JPG or JPEG file here, or
Nothing is uploaded when you pick a file.
How it works
- 1
Choose your JPG file
Drag a file onto the tool above or click to browse. It accepts .jpg and .jpeg files, and the file is read directly by your browser rather than sent anywhere.
- 2
Confirm the 100KB target
The target is already set to 100KB on this page. You can change it to any other figure in KB or MB if the form you are filling in wants something different.
- 3
Choose how the size is added
The default pads the file with extra COM comment segments, a part of the JPG specification that every decoder skips, so the image is untouched. Switch to "increase resolution" if you want more pixels as well as more bytes.
- 4
Download the result
Press the button and your browser saves the new file, at exactly 100KB. Nothing was uploaded, so there is nothing stored anywhere for you to delete afterwards.
Why you might need this
The form is not judging your image — it is judging its byte count, against a floor of 100KB. That rule was written to stop people uploading unreadable 5KB scans, and it has no way of telling those apart from a clean scan that simply compressed well.
Rescanning at a higher DPI would also clear the threshold, and if your scan really is hard to read that is the better fix. If it is fine and only the number is wrong, padding it is the honest shortcut: the bytes go into extra COM comment segments, a part of the JPG specification that every decoder skips, and the person who opens the file sees exactly what you scanned.
What a 100KB file usually is
100KB is the single most common minimum in upload requirements, and it is the round number specifications reach for when they want "a proper scan, not a thumbnail". Visa applications, professional registration bodies and university admissions portals all use it, often as the floor of a 100KB–200KB band.
A 100KB JPG is roughly 1000×1000 pixels of photographic detail, or a colour scan of an A4 page at around 150 DPI. Documents at this size are comfortably readable, which is what the requirement is trying to guarantee.
Frequently asked questions
Will this reduce my image’s quality?
It cannot. Quality is only ever lost when a file is decoded and re-compressed, and this tool does neither — it writes extra COM comment segments, a part of the JPG specification that every decoder skips and leaves the compressed image data exactly as it found them. Open the original and the result side by side and they are indistinguishable, because they are.
Is my file uploaded to a server?
Never. This site has no route that accepts a visitor file at all. Everything happens inside the browser tab you are reading this in, which is why it costs nothing to run and why a passport scan or bank statement is as safe here as it is in your own file manager.
What file formats are supported?
This page is set up for JPG images. The tool also handles PDFs and the other image format — drop any supported file in and it will detect the type from the file itself rather than the extension.
Why would I need to increase file size instead of decrease it?
Minimum size rules exist because file size is the cheapest available proxy for "is this scan readable". A form cannot easily judge legibility, so it judges bytes — often at exactly 100KB. Modern compression is good enough that a perfectly clear document lands under the threshold, and then the only thing wrong with it is the number.
Is this free to use?
Yes — free, with no account, no watermark, no email address and no limit on how many files you run through it. Because the work happens on your own device rather than on a server, there are no processing costs to pass on.