PDF Compressor
人気100% ブラウザ内処理Shrink PDF file size up to 90% — Light, Balanced, or Strong compression, right in your browser with no upload and no task limits.
Select a PDF file
PDF documents only · processed 100% in your browser · max 100MB
Pages are re-encoded locally — your document never leaves the browser. Output pages are images, so text is no longer selectable.
Compress PDF Files Free — No Upload, No Limits, No Watermark
Most "free" PDF compressors cap you at two documents a day, stamp a watermark on the result, or quietly upload your contracts to a processing server. This one re-encodes your PDF entirely inside your browser — pick Light, Balanced, or Strong, and download the smaller file immediately. No sign-up, no task counter, no watermark, and your document never leaves the device.
How it works: bloated PDFs are usually bloated because of huge scanned images or uncompressed page streams. Each page is re-rendered through your browser's own JPEG encoder at a quality you choose and rebuilt into a clean PDF — the same trick commercial tools use, minus the server farm. Document metadata (author, producer app) is dropped along the way.
Honest limits: output pages are images, so text is no longer selectable, and a PDF that is already efficiently encoded may barely shrink — the tool tells you when that happens instead of hiding it. For signing or further editing, use the PDF editor on the original.
よくある質問
PDF Compressorを安全かつ効率的に使うために知っておきたいこと。