Visa and immigration uploads
Visa portals frequently cap each supporting document at 100 KB. Text-based bank letters and invitation letters usually compress without visible change, which matters when a consulate reviews the scan quality.
Runs entirely in your browser
Compress a PDF to 100 KB
100 KB is the most requested PDF limit on the web — and the one most tools quietly fail to hit while still claiming success.
Verified 100 KB ceilingText stays selectable when possibleNo upload
- No uploads
- No account
- No watermark
document.pdf
——Analysing…
Advanced options
Your file stays in this browser tab. Closing it deletes everything.
Compressing your PDF…
0%Preparing…
Large files can take a minute. The interface stays responsive — you can keep scrolling while it works.
That file could not be compressed
No uploadNo sign-upNo watermarkWorks offline
Files never leave your deviceNo uploadsNo accountNo watermarkNo file storageWorks offlineOpen target sizesMeasured output
The realistic picture
What 100 KB actually means for your document
Portals pick 100 KB because it is small enough to be cheap to store and large enough for a few pages of text plus a logo. Most typed documents of two to five pages can reach it. The hard cases are scans, photo-heavy brochures and PDFs exported from design tools with embedded fonts and high-resolution images.
This compressor works through the file the way a desktop optimiser would: rebuild the structure, strip metadata, recompress JPEG images at decreasing resolution and quality, and verify the byte count after every attempt. You see the number that actually resulted, not an estimate.
Where this limit shows up
Four situations that ask for 100 KB
University admissions portals
Transcripts, certificates and statements of purpose often have a 100 KB ceiling per file. Typed documents keep their text layer, so admissions systems can still read and index them.
Job applications with strict limits
Some applicant tracking systems reject attachments above 100 KB. A two-page resume with a small photo can usually be brought under the limit while staying crisp on screen.
Email attachments on mobile data
A 100 KB PDF sends instantly even on a weak connection, which is useful when you are submitting a form from a phone.
Honest expectations
What fits in 100 KB, and what does not
These are typical outcomes from real documents, not promises. The compressor reports the measured result for your specific file.
| Document type | Outlook |
|---|---|
| 2–5 pages, typed text | Very reliable. |
| 10 pages of text | Usually possible, quality unchanged. |
| Text plus several photos | Possible; photos are downscaled. |
| Scanned 5+ page document | Possible at reduced resolution; small print may soften. |
Keep it private
The file is read in your tab and never transmitted.
Keep it readable
Text and vectors survive unless rasterising is the only option.
Keep it honest
A target is only marked met when the measured bytes fit.
Questions about compressing to 100 KB
Specific answers for this size limit, including when it is the wrong choice.
How do I know the result is really 100 KB or less?
The tool reads the byte length of the generated file after saving it and compares that number to 100 × 1024 bytes. The result panel shows the exact size and a pass or fail verdict. There is no estimation step and no rounding that could hide an overshoot.
Will links and form fields survive compression?
Links and annotations live in the page structure and are preserved by the structural and image passes. Filled form values are preserved too. Rasterising pages, which is a last resort, flattens everything, including links.
Why do some tools produce a bigger file than the original?
Re-saving a PDF can expand it if the original used efficient object streams and the tool rewrites everything uncompressed. This compressor keeps object streams on, compares every intermediate result to the original, and returns the original when nothing smaller is achieved.
Is 100 KB enough for a scanned certificate?
For one or two pages at modest resolution, yes. A colour scan of a stamped certificate at 100 KB is usually readable on screen but may look soft when printed. If the portal accepts 200 KB, use the larger target for better legibility.
Does compression remove my signature or stamp?
No content is removed. Signatures and stamps that are images are recompressed along with other images but remain in place. Only metadata (author, software, timestamps) is stripped, and you can turn that off.
Can I compress a 200 MB PDF to 100 KB?
Technically the tool will try, but a 2000:1 reduction usually means unreadable output, and large files can exhaust memory on phones. You will get the smallest achievable size with a clear note that 100 KB was not possible.
Other limits