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Compress PDF to 400 KB

Shrink a PDF down toward 400 KB, privately in your browser.

Compress PDF

Drop your PDF here
or click to browse · PDF file

Target size

Pages are re-rendered and recompressed toward this size — best for scans and photo-heavy PDFs. Text stops being selectable in the result.

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Jump straight into a ready-made PDF spell.

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About this tool

Compress PDF to 400 KB

This compressor re-renders each page of your PDF and rebuilds it as a smaller file aimed at about 400 KB. It works entirely on-device — nothing is uploaded. Best for scanned documents and photo-heavy PDFs; very text-heavy PDFs may not need compressing at all.

  • Aims for about 400 KB — never larger than your original file.
  • Best for scans, photo PDFs, and phone “share as PDF” exports.
  • Runs fully in your browser — your document is never uploaded.
  • Free, unlimited, no account, no watermark.

How it works

  1. Drop in the PDF you want to shrink.
  2. Confirm the target size (prefilled to 400 KB), or open the custom compressor for a different number.
  3. Press “Cast the Spell” — Imgician rebuilds a smaller PDF from your pages.
  4. Download the compressed file.

FAQs

PDF questions, answered

Straight answers about merging, splitting, and keeping your documents private.

How do I compress a PDF to 400 KB?

Open Compress PDF, drop your file, enter 400 KB as the target, then cast the spell. Imgician re-renders each page and rebuilds a smaller PDF aimed at that size.

Does compressing a PDF reduce text quality?

Yes — this compressor rasterizes each page to an image to guarantee a smaller file on any PDF, so text is no longer selectable in the result. It’s best for scans and photo-heavy PDFs. Short, text-only PDFs are often already small enough to skip compressing.

Will the compressed PDF ever be larger than the original?

No. If a PDF is already under your target size, Imgician keeps the original file rather than re-rendering it unnecessarily.

Is PDF compression private?

Yes. Every page is rendered and recompressed in your browser — your PDF is never uploaded to Imgician’s servers.

Are my PDFs uploaded to a server?

No. Merge, split, and page extraction all run in your browser using pdf-lib — your documents are never uploaded to Imgician’s servers and we don’t store the files you process.

Is Imgician’s PDF toolkit free?

Yes. Merge PDF and Split PDF are free, with no signup, no watermark, and no page limit imposed by a server.

Can I also turn images into a PDF?

Yes — that lives with the image tools: use the image to PDF converter to turn one or more photos into a PDF, optionally compressed to a target KB.

Does merging or splitting reduce PDF quality?

No. Pages are copied as-is from the source PDF into the new file — nothing is re-rendered or re-compressed, so text and images keep their original quality.

Will this work with password-protected PDFs?

Encrypted or password-protected PDFs may fail to open. Remove the password in the app that created it first, then merge or split the unprotected file here.