Compress PDF to 100 KB
Compress a PDF to under 100 KB online free. Automatic multi-pass compression hits your target — no sign-up, files deleted immediately.
Drop PDFs here, or click to browse — up to 20 at once
Accepted: application/pdf,.pdf
Click or drag to upload
Professional Engine
Rebuilds your PDF with Ghostscript — recompressing images, deduplicating data, and stripping bloat.
Batch + Target Size
Compress up to 20 PDFs in one go — by quality, or to a hard ceiling like 1 MB — and grab them all as a ZIP.
Deleted Immediately
Each PDF is processed in a temp file and wiped the moment its result is ready.
Need your PDF under 100 KB? This page is the PDF compressor with the 100 KB target already set — just drop in your file and click Compress PDF. It's the fastest way to satisfy strict government portals and application forms with tiny upload caps.
Instead of one fixed quality setting, the compressor runs progressively stronger passes — recompressing images, deduplicating resources, and stripping structural bloat — until your file fits under 100 KB. If a document physically can't reach the target without becoming unreadable, you get the smallest achievable file and an honest note saying so. Files up to 200 MB are supported, and your PDF is deleted the moment the result is delivered.
How to compress a PDF online
- 1Drag and drop your PDFs into the upload zone — a single file or up to 20 at once (200 MB each).
- 2Pick a mode: By quality for a preset (Recommended suits most documents), or To target size if you need each file under a specific limit like 500 KB or 1 MB.
- 3Click Compress and wait a few seconds per file — each row shows its progress and savings as it finishes.
- 4Review the before/after sizes and the percentage saved for every file.
- 5Download files individually, or click Download all (ZIP) to grab the whole batch in one archive.
Frequently asked questions
How do I compress a PDF to under 100 KB?
Upload your PDF above — the 100 KB target is pre-selected — then click Compress PDF and download the result. The tool automatically applies as much compression as needed to fit under 100 KB.
What if my PDF can't be compressed to 100 KB?
Some documents (very long scans, hundreds of pages of photos) physically can't fit extreme targets while staying readable. In that case you receive the smallest file the content allows, plus a clear message that the target was missed — never a silently broken document.
Will my PDF still be readable?
Yes. Compression works by downsampling embedded images; text is never rasterized and stays sharp at every level. Tighter targets mean grainier images, but the document remains legible.
Is my PDF stored anywhere?
No. It is processed in a short-lived temporary file that is deleted the moment your compressed PDF is delivered.
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