Increase File File Size to 1MB Free
This tool makes a file exactly 1MB, which is what upload forms with a minimum size are checking. It adds inert padding rather than re-compressing, so the image is untouched. Free, no account, and your file stays on your own device.
Increase JPG, PNG or PDF file size
Runs entirely in this browser tab. Your file is never uploaded.
Drag a JPG, PNG or PDF file here, or
Nothing is uploaded when you pick a file.
How it works
- 1
Choose your file
Drag a file onto the tool above or click to browse. It accepts JPG, PNG and PDF files, and the file is read directly by your browser rather than sent anywhere.
- 2
Confirm the 1MB target
The target is already set to 1MB 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 metadata areas that the file format reserves for data decoders ignore, 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 1MB. Nothing was uploaded, so there is nothing stored anywhere for you to delete afterwards.
Why a form would reject a file for being too small
Minimum file size rules turn up wherever documents are submitted in bulk: exam boards, immigration services, banking KYC forms and university applications. The rule is a proxy for "is this scan detailed enough to read", and modern compression is good enough that it regularly catches files that are entirely fine.
Because padding writes into metadata areas that the file format reserves for data decoders ignore, the file that comes out is structurally valid and visually identical — just 1MB instead of whatever it was. The validator is satisfied and the person reading your document sees exactly what you scanned.
What a 1MB file usually is
1MB is where requirements stop being about photographs and start being about documents. Portfolio uploads, tender submissions, planning applications and professional certification bodies all set minimums around here, on the reasoning that a serious document scanned properly will exceed it.
A 1MB PDF is typically five to ten scanned pages, or one page scanned in colour at 300 DPI. A 1MB JPG is a full-resolution photograph from a modern phone camera after moderate compression.
Frequently asked questions
Will this reduce my image’s quality?
No. The padding goes into metadata areas that the file format reserves for data decoders ignore, so the image data is never decoded or re-compressed. What comes out is pixel-for-pixel identical, just larger on disk.
Is my file uploaded to a server?
No, and you do not have to take that on trust. Load this page, disconnect from the internet, and use the tool — it still works, which it could not do if your file had to reach a server. Nothing is transmitted, so there is nothing stored and nothing to delete afterwards.
What file formats are supported?
JPG (including .jpeg), PNG and PDF. Each one is padded using the structure its own specification reserves for data readers can ignore, so the output is always a valid file of that type.
Why would I need to increase file size instead of decrease it?
Because some upload forms enforce a minimum as well as a maximum, and 1MB is a common one. The minimum is meant to reject scans too low-quality to read, but it catches efficiently compressed files too. When your file is legible and simply small, making it bigger is the only thing standing between you and a successful submission.
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.