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Compress PDF to 100KB

Government and exam portals reject anything over their cap, and 100KB is one of the most common. This tool does not guess: it searches JPEG quality first and render scale second until your PDF lands at or under 100KB, then reports the exact size it achieved. Your document never leaves your device — worth knowing when the file is a marksheet or ID proof.

  • No upload — files stay on your device
  • Works offline once loaded
  • Free forever, no signup, no watermark
Drop a PDF here, or tap to choose Contracts and statements are safe — nothing is uploaded

The output is guaranteed at or under this size whenever the page count allows it — the practical floor is roughly 10 KB per page.

70% keeps scans clearly readable; drop lower only when size matters more than crispness.

Honest trade-off: this compressor re-renders every page as a JPEG image. Scanned documents shrink dramatically, but the result has no selectable text — like a photocopy. If you need the text layer kept, don't use a rasterising compressor.

{{ stage || 'Working…' }}
  • Original {{ sourceSizeLabel }}
  • Compressed {{ resultSizeLabel }}
  • Saved {{ savedPercent }}%
  • Pages {{ pageCount }}

Landed under your {{ targetLabel }} target.

Even at the lowest quality and scale, this document cannot reach {{ targetLabel }} — the practical floor is about 10 KB per page. This is the closest result; splitting the PDF into parts is the reliable fix.

Pages are now images — text is no longer selectable.

From a free tool to your own software

Software for application portals and admissions offices

Every recruitment drive and admission season, thousands of applicants hit the same wall: a certificate scan rejected for being a few kilobytes over the limit. When your portal pushes that problem back onto the applicant, you lose completed applications and your helpdesk fills with calls. Purpose-built intake software accepts what people actually have and prepares it for storage and review on your side.

  • Admission portals that accept real-world scans

    Applicants upload phone scans as they are; the portal checks readability, resizes and stores each document to your spec, and flags only the ones a person genuinely needs to redo.

  • Recruitment application platforms

    Run a hiring drive from notification to shortlist, with document slots, fee tracking, admit cards and a verification screen that shows every certificate side by side.

  • Assisted filing desk software

    For centres that fill forms on behalf of customers: keep each customer's documents once, prepare them to each portal's size and format rules, and track which applications are pending.

  • Storage clean-up for scan archives

    Years of oversized scans slow backups and inflate storage bills. A batch job can recompress archived files to a sensible quality, keep originals where you need them and report the space saved.

Who we build this for: Colleges, universities, recruitment agencies, exam bodies and application-filing centres across India.

This tool runs entirely in your browser. The team that built it designs custom software for businesses and runs DigiSign, our own signage platform, in production.

Plan an application portal Web & Mobile Applications

How to use this tool

  1. Add your PDF

    Drop the file in — its current size shows immediately so you know how far there is to go.

  2. Confirm the 100KB target

    The target is preset to 100KB; change it with the slider or type any KB value your portal demands.

  3. Let the search run

    The tool renders passes at falling quality and scale until one fits under the target, then shows the achieved size for you to download.

Questions people ask

How do I compress a PDF to exactly 100KB?

Drop the file here and press Compress. The tool binary-searches JPEG quality at full scale, and if quality alone cannot get under 100KB it lowers the render scale and searches again — stopping the moment a pass fits, so you keep the best possible quality under the cap.

Is the result guaranteed to be under 100KB?

Yes, whenever the page count physically allows it — the floor is about 10 KB per readable page. If your document has too many pages to fit, the tool says so and gives you the closest smaller result rather than pretending.

Why do government portals reject my PDF?

Portals like SSC, UPSC, IBPS and state scholarship sites enforce hard upload caps, commonly 100KB to 1MB. A file even one kilobyte over is refused, which is why this tool targets the number exactly instead of just "compressing".

Will my document still be readable at 100KB?

For a few pages, yes — the search keeps the highest quality that fits, so a 2–3 page scan stays clearly legible. The more pages you squeeze under the same cap, the softer each one gets.

Is it safe for marksheets, Aadhaar and certificates?

Yes — compression runs 100% on your device. This site has no upload endpoint, which is the whole reason to use it over tools that send your ID to a server.

Will the text be selectable afterwards?

No — pages are rebuilt as images to guarantee the size, like a photocopy. Portals accept this fine; it is the standard trade-off for hitting hard KB caps.

Related tools

Who makes these tools

Free because it costs us nothing to run: your browser does the work, not our servers. Made by Dynamb Technologies — we build software for businesses.