How to Compress a PDF to 150KB (Free, Browser-Based, 2026)
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Quick Answer
To compress a PDF to 150KB: upload to FileCurve PDF Compressor, select "Maximum" or "High" compression depending on your original size. A 1–3 page scanned document at maximum compression + grayscale conversion typically reaches 80–180KB. For job application portals (most cap at 200KB for supporting docs) and university admissions (many require under 200KB), 150KB is a safe target.
Step-by-step
- 1
Upload your PDF to FileCurve PDF Compressor.
- 2
For a 1–3 page scanned PDF: select "Maximum" compression, enable grayscale.
- 3
For a 4–8 page mixed PDF: select "High" compression, enable grayscale for color pages.
- 4
Check output size. If above 150KB, split the PDF and compress each part separately.
- 5
Verify text is still readable at 100% zoom before submitting.
- 6
Download.
Expected output
Format
PDF, grayscale preferred, images at 72–100dpi
Quality setting
High to Maximum compression
Estimated size
5–8% of a typical scanned PDF
Why you might need this
- →Job application portals (common 200KB cap for supporting documents — 150KB gives buffer)
- →Indian university admission portals — most cap supporting docs at 100–200KB
- →UPSC, SSC exam document uploads — 150KB is a common requirement
- →Bank account opening portals (KYC documents, proof of address) — 200KB is typical max
Troubleshooting
University admission portal says "PDF must be under 150KB"
A 1-page statement of purpose or transcript compressed to Maximum + grayscale should be well under 150KB. If your document has embedded color images or photos, those are the culprit — convert to grayscale.
My resume PDF is 800KB and drops to 280KB with Maximum — still too large
Resume PDFs bloat when they include photos, custom embedded fonts, or colored backgrounds. Remove the photo from the resume PDF and use a simpler template. A text-only resume is 50–100KB.
Naukri.com job portal rejects my compressed PDF
Naukri.com caps resumes at 2MB — 150KB is well under. The rejection may be a format issue (not truly PDF) or an incorrect file type. Re-export from Word/Google Docs as PDF.
Transcript PDF from university is 2MB — how to get to 150KB?
University transcripts are often scanned at high DPI. Maximum compression + grayscale usually achieves 150KB for a 4–8 page transcript. If still above, check if the university offers a digital (not scanned) version.
Frequently asked questions
What is the typical job portal PDF size limit?
Most Indian job portals (Naukri.com, Indeed India) accept resumes up to 2MB. For supporting documents (certificates, marksheets), caps are often 200–500KB. 150KB covers all these.
Can I compress a 10-page marksheet to 150KB?
Challenging but possible. Maximum compression + grayscale converts a 10-page scanned marksheet from ~5MB to 200–400KB. Below 150KB requires splitting to the relevant pages only.
Will maximum compression affect the authenticity of my documents?
No — compression changes the file size but not the content. Institutions verify authenticity through official verification, not PDF compression level.
How do I know what compression level to use?
Start with "High". If the output is still above 150KB, switch to "Maximum" and add grayscale. Maximum is always sufficient for 1–3 page text-heavy scans.