Compress PDF to 100KB — Free, No Upload

For portal uploads that reject files over 100KB

Make a PDF 100KB or smaller for a portal that rejects larger uploads. The file stays on your phone. If 100KB is impossible without ruining the pages, you will see the real size.

Strong compression turns pages into images

To hit a small target, each page may be saved as a JPEG. Text on those pages is not selectable or searchable, and a screen reader cannot read it. If the file already fits, the original text is kept.

Choose a PDF

Up to 50 MB. The file is read in this tab and is not uploaded.

Size or quality

Target size tries to finish at or under the limit. Quality level is a fixed setting when you do not have a number to hit.

Trying for 100 KB (1,00,000 bytes).

Best for photocopies and camera scans. Colour photos of documents get much smaller in gray.

When a form says maximum 100KB

A lot of Indian government and exam-related uploads fail with a plain message: the file must be under 100KB. The rule is about the file, not the paper size. A one-page affidavit and a ten-page scan are judged the same way. Typical files that can make it are a single scanned certificate, a short income or caste certificate, or a one-page marksheet — especially if you tick grayscale, which is already on for this preset.

This is not a promise that every portal wants 100KB. SSC and several other exams capture the photograph live and only ask for a small signature image, not a 100KB PDF. Read the notice for your form. If it allows 200KB, use that preset: the pages stay sharper.

What you give up to reach 100KB

100KB is 100,000 bytes here. That is stricter than 100 × 1,024, so a result that shows 98 KB is under both ways of counting. If your PDF is already under the line, we do not turn it into images, and the text stays selectable.

If it is over, pages become JPEGs and resolution steps down toward 60 DPI. A clerk zooming in on a stamp still needs to read it, so we do not go further. A colour camera roll of eight or ten pages will often stay above 100KB. The tool tells you the size it actually reached instead of downloading a file that the portal will reject.

If 100KB does not fit

Keep grayscale on. Split the PDF and upload only the page the form asked for — extra pages burn the whole budget. If the notice allows 200KB, switch to that target rather than forcing 100KB. When you control the scan, 150 DPI grayscale is enough for a form; a 300 DPI colour scan is why the file was huge in the first place.

Other target sizes

Related Free Tools

PDF Splitter

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How to use the Compress PDF to 100KB

  1. Add the PDF the portal rejected

    Choose the file that was over the limit. It stays on your device.

  2. Leave the target at 100KB

    100KB is already selected. Grayscale starts on, which is what usually gets a one-page scan under the line.

  3. Compress and watch the pages

    Progress advances page by page so the tab can keep responding on a phone.

  4. Check the bytes before you upload

    Download only if the result says it fits 100KB (100,000 bytes). If it does not, the page explains why.

Compress PDF to 100KB FAQ

Which uploads actually need a PDF under 100KB?

Whatever your own notice says. People hit this limit on scholarship forms, municipal certificates, and some state application sites. It is not a universal exam rule — several exams take a live photo and a small signature image instead of a 100KB PDF. Read the instruction on the form.

Why is my scanned PDF still above 100KB?

Each page has to stay readable, so compression stops at about 60 DPI. A colour scan of many pages cannot fit 100,000 bytes at that floor. Remove pages with the splitter, keep grayscale on, or use 200KB if the portal allows it.

Does 100KB here mean 100,000 bytes or 102,400?

100,000 bytes. That is the stricter definition, so the file also fits a portal that counts 1KB as 1,024 bytes. The result shows both the KB figure and the exact byte count.

Will text still be searchable after compressing to 100KB?

Only when the file was already small enough to skip the image pass. A scan that had to be rebuilt is a set of JPEG pages: the words are not selectable or searchable.

Is my certificate uploaded to EasyPDFHub?

No. The file is processed by JavaScript inside your browser tab and never sent to our servers. Closing the tab clears it from memory.

Quick answers

Why does a multi-page scan stay above 100KB?

100KB on this tool is 100,000 bytes for the whole file, shared across every page. Each page also has a readability floor of about 60 DPI, because a softer image makes a stamp or a signature useless to the person checking the form. A one-page grayscale certificate often fits. A colour scan of eight or ten pages usually does not, and no honest compressor can promise otherwise. Remove pages the form did not ask for, keep grayscale on, or move to a 200KB limit if the notice allows it. The result screen shows the real byte count before you download, and the original file on your phone is never modified.