Convert an Image to PDF Under a Size Limit
Application portals set hard byte limits and give you nothing to hit them with. Set a figure and the converter works down to it, then tells you exactly what it achieved.
- 🔒 Nothing is uploaded
- 💧 No watermark
- ♾️ No file limit
Image to PDF under a size limit
Set 200 KB, or any figure a portal demands. This is the one mode that re-compresses on purpose.
🔒 Private by design: your images are converted in this browser tab and never uploaded.
Converting Under a size limit to PDF
Pick your limit
50 KB up to 5 MB, or leave it off entirely. Portals usually state the figure in their upload error message.
It searches for the best fit
Quality is reduced step by step, and only if that is not enough are pixels taken away. The assembled PDF is measured each pass, not the image.
Check the number before you upload
The result shows the real file size. If your limit was not reachable, it says so rather than handing you something that will be rejected.
This page breaks the site's own rule, on purpose
Every other converter here avoids re-compressing your image. This one cannot: fitting a photograph into 200 KB means throwing data away, and pretending otherwise would be useless to you. So it is opt-in, it is labelled, and the result tells you what it cost.
How the fit is found
The first attempt runs at 92% quality. If that already fits, nothing more is done and nothing is lost beyond the single re-encode. If it does not, JPEG quality is binary-searched between 92% and 35% — about eight passes, which lands within a fraction of a percent of the best quality that still fits.
Only if quality alone cannot get there does the converter start removing pixels, stepping the longest edge down 10% at a time. That order matters: quality loss at 60% is far less visible than the same file size reached by halving the resolution.
Crucially, the assembled PDF is measured every pass, not the image inside it. A PDF carries its own structure — the page tree, the cross-reference table, the image dictionary — and a converter that measures only the image will overshoot the limit every time.
There is a floor, and it is told to you
That structure costs a couple of kilobytes whatever you do to the picture, so a 5 KB target for a real photograph is not achievable by any tool, including this one. When your limit cannot be reached, the result says so and gives you the smallest version it managed, rather than silently handing back something over the line.
Portals, forms and the numbers they ask for
Common limits worth knowing: 200 KB and 500 KB for government and university application forms, 1 MB for most job-application portals, 10 MB for typical email attachments, and 25 MB for Gmail. If a form demands a specific page size as well, set that on the page size and margins tool first — both controls are on this page too.
If your PDF is enormous and you do not know why, the cause is usually PNG used for photographs. That is worth two minutes before you compress anything.
Under a size limit questions
Will the image look bad at 200 KB?
Does the limit apply per page or to the whole file?
Why can't I reach 10 KB?
Can I make a PDF bigger to meet a minimum size?
More ways in
Image to PDF
Every image becomes a page. Nothing is uploaded — the conversion happens in this tab.
Without losing quality
After converting, each file tells you exactly which route it took and what came out.
HEIC to PDF
Reads Apple’s HEIC format in any browser, including the ones that cannot display it.
A4 and page size
Choose the sheet, the margin and how the image sits on it — and see the print resolution you get.
Multi-page TIFF
Scanner and fax TIFFs become multi-page PDFs, page for page, and any page we cannot read is named.
JFIF to PDF
A JFIF is a JPEG. It goes into the PDF as-is, with nothing decoded and nothing re-compressed.
WebP, AVIF, BMP
Your browser already decodes all three. They are re-encoded once on the way into the PDF.
Convert on your phone, with or without signal
The free iPhone app does everything this page does, plus a document scanner that finds the edges of a page for you, and a history of every PDF you have made. Nothing is uploaded there either.