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PDF Compress

Compress PDF files to reduce size — choose compression level and download instantly

Runs locally in your browser🆓Free — no sign-up🔒100% Private

Large PDF files cause problems: they exceed email attachment limits, fail to upload to document submission portals, take too long to download on slow connections, and consume unnecessary storage. PDF compression reduces file size by optimising the encoding of embedded images, removing redundant internal data, and compressing content streams. This compressor reduces most PDFs — especially those containing large embedded photographs or high-resolution scanned pages — by 30-70% without visibly degrading text quality. The compressed file downloads immediately. The situations where this tool proves essential are varied and common. A freelance photographer delivering a portfolio to a client may find that InDesign or Photoshop exports a presentation PDF at 80 MB, far too large to attach to an email or share via most file-transfer links. A student submitting a dissertation through a university portal often hits a strict 10 MB upload limit, even though their document only contains text and a handful of diagrams. A small business owner scanning signed contracts and invoices on a mobile app can accumulate hundreds of megabytes of scanned PDFs within weeks, inflating cloud storage costs and slowing down shared drives. Professionals who regularly handle document-heavy workflows — accountants, paralegals, medical administrators, and academic researchers — benefit most from this tool, as they routinely need to send or archive multi-page documents that originate from high-resolution scanners or design software. All compression happens entirely in your browser. Documents are never uploaded to or processed by any external server, which means sensitive contracts, financial records, and personal identification documents remain completely private throughout the process. No account is required, no files are stored remotely, and there is no usage limit. Simply open the tool, select your PDF, and download a smaller file in seconds.

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Click or drag & drop a PDF file

PDF files only

How to use PDF Compress

  1. 1.Upload your PDF by dragging it onto the page or clicking 'Choose File'.
  2. 2.Select a compression level: Basic (minimal quality loss), Standard (balanced), or Maximum (smallest file).
  3. 3.See the estimated output file size before confirming — compare with your original.
  4. 4.Click 'Compress PDF' to process the file in your browser.
  5. 5.Download the compressed PDF and verify the file size reduction before sharing or uploading.

Key Features

Three compression levelsChoose Basic, Standard, or Maximum to control the quality-vs-size trade-off.

Size previewSee the estimated output size before committing to the compression.

Browser-basedYour PDF is never uploaded — compression runs entirely in your browser.

Significant size reductionTypical compression reduces file size by 30–70% depending on content type.

Frequently Asked Questions about PDF Compress

Upload your PDF above, select a compression level (Basic, Standard, or Maximum), and click Compress PDF. Download the smaller file when processing completes.
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