Compress PDF to 400 KB

Aim for a PDF under 400 KB for application forms.

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Compress PDF to 400 KB help

Choose a PDF and try to fit it within 400 KB. Some job and exam application forms ask for documents under this size. Text stays selectable, and a result that misses the limit is clearly marked.

How to use Compress PDF to 400 KB

  1. Choose the PDF you need under 400 KB.
  2. Keep the 400 KB target selected, or pick another quick size.
  3. Click Compress PDF to start working toward 400 KB. You can cancel at any time.
  4. Check whether it reached 400 KB, compare the first page, then download your copy.
Options explained
Choose a target file size
Starts at 400 KB. Pick a different quick size if your form allows more or less. Sizes use 1024 bytes per KB.
Remove saved document details
Optionally remove title and author properties; names printed on pages remain.
Use stronger compression
Works best with scanned PDFs and PDFs with images. Images may look blurry or lose detail. Check small print in the preview. Your target size is not guaranteed.
Limits and supported files

Unlocked PDF documents, including text and images. Signed files require confirmation to create a changed copy.

The requested size is an aim, not a guarantee. Large image files may stay above it even after compression. Stronger compression can make images noticeably softer; review the preview.

Tests covered 1,000 simple text pages and generated image PDFs up to 200 MB. Large files may use the full search time and remain above your target.

Tested in Chromium, Firefox and WebKit. Large-file checks used a 100 KB target.

Questions

Can every PDF fit within 400 KB?

No. A long document or an already small file may not fit within 400 KB. You get the smallest checked result, and the page tells you if it missed the target.

Will compressing to 400 KB turn my text into a picture?

No. Selectable text is kept. Pictures may be resized, saved at lower quality or turned grey. Your original file is not changed.

What if my PDF is slightly over 400 KB?

Try again with “Use stronger compression” turned on. A PDF only slightly over the limit often fits once its pictures are made a little smaller.

How do I check a PDF reduced to 400 KB?

Open the result preview to compare the original and the result side by side. Check small print and important numbers before you use the file.

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