Compress a PDF to 150 KB
A little more room for multi-page proofs and mark sheets.
Processed in your browser. Nothing is uploaded.
How to compress a PDF to 150 KB
- 1
Choose your PDF, such as mark sheets or address proofs.
- 2
Select 150 KB as the target size.
- 3
Tap “Compress to 150 KB” and wait while each page is optimized.
- 4
Confirm the result is under 150 KB, then download.
A practical middle ground
Some forms allow up to 150 KB per document, which is half as much room again as the common 100 KB limit. That extra space makes a visible difference for multi-page proofs, like a set of semester mark sheets, a two-page address proof, or a passport’s first and last pages scanned together.
Reduce PDF size to 150 KB, or get a PDF under 150 KB.
Use all the space you’re given
It’s tempting to compress everything as small as possible, but people reviewing your application need to read small print: roll numbers, grades, dates and stamps. Atifo chooses the highest quality that still fits under 150 KB, rather than the smallest file it can make.
Combining documents first
If the form wants several pages in one upload, put them together before compressing:
- Use Merge PDF to combine the pages in the right order.
- Compress the merged file here to 150 KB.
Compressing each file first and merging afterwards often adds up to more than the limit, and loses more quality than doing it once.
When 150 KB isn’t enough
Long documents with many scanned pages may not fit at a readable quality. Atifo tells you when that happens and shows the smallest readable size it achieved. Removing unneeded pages, or switching on black & white for text-only scans, usually closes the gap.
Private by design
Mark sheets and identity documents carry personal details. Atifo processes them in your browser and never uploads them.
Other target sizes
Compress PDF to 20 KB · Compress PDF to 50 KB · Compress PDF to 100 KB · Compress PDF to 200 KB · Compress PDF to 300 KB · Compress PDF to 500 KB · Compress PDF to 1 MB · Compress PDF to 2 MB
Frequently asked questions
When is 150 KB better than 100 KB?
If the form allows 150 KB, use all of it: the extra 50% of space means noticeably sharper scans, which matters for small print like grades and registration numbers.
Can I combine several mark sheets first?
Yes. Use Merge PDF to put them in one file, then compress it here. Merge first, because compressing each file separately and merging can exceed the limit.
How long does compressing take?
A few seconds for short documents on most phones. Atifo tests settings on sample pages first, so it usually needs only one full pass.
Is my document stored anywhere?
No. The file is processed by your browser and never leaves your device. Closing the page clears it from memory.