Compress PDF to 300KB Online Free — No Quality Loss
Compress any PDF to under 300KB for marksheet uploads, exam forms or email limits. Free browser-based compressor — no signup, no upload.
Many exam portals require marksheet and certificate PDFs to be under 300KB. A high-resolution scan of a marksheet often lands at 1–3MB, well over the limit.
This tool compresses your PDF to sit just under the 300KB mark while keeping text and grades readable. Everything runs in your browser — your file never leaves your device.
Compress your PDF to under 300KB — free
Identity proof — keep it legible, Aadhaar watermark visible.
Scanned documents are rasterised and re-encoded to land safely under the portal's KB limit. If the source is already under the limit it is passed through unchanged. Always keep a copy of the original file.
Upload a PDF to preview the compressed result.
Exam PDF Compressor runs entirely in your browser — no document ever leaves your device. Multi-page and batch files are supported; batch downloads come as a ZIP.
300KB compression target
- Target: under 300KB PDF output.
- Best for: marksheet uploads, certificate submissions, moderate file sharing.
- Text and key details remain legible at this compression level.
How to compress a PDF to 300KB
- 1
Upload the PDF
Drag your large PDF into the tool.
- 2
Set target to 300KB
Enter 300 in the target KB field, or choose the marksheet preset.
- 3
Process
The compressor re-rasterizes pages and tunes quality until the file sits under 300KB.
- 4
Preview and download
Check the readability score and page preview, then download the compressed PDF.
Pro tips
- Scan at 200 DPI for marksheets — high enough for readability, low enough to compress well.
- If your marksheet has a photo, ensure it stays visible after compression.
- Preview the compressed PDF zoomed-in to check that grades and dates remain legible.
Frequently asked questions
Is 300KB enough for marksheet uploads?
Yes — most exam portals accept marksheets between 30KB and 300KB. This tool targets the upper end for best readability.
Will compression to 300KB make my marksheet blurry?
The tool re-rasterizes at 200 DPI for marksheets and picks the highest quality that still meets 300KB. Grades and text usually stay readable. Always preview.
Can I compress a multi-page marksheet to 300KB?
Yes — the tool compresses the entire document so the total output stays under 300KB.
Is my PDF uploaded anywhere?
No — compression runs entirely in your browser using PDF.js and canvas, so your PDF never leaves your computer.