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Compress documents

Make PDF, Word, Excel and PowerPoint files smaller. Pictures are recompressed, text stays untouched.

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PDF · DOC · DOCX · XLSX · XLS · PPT · PPTX

Files never leave your device

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How to compress documents

  1. Add your files

    Drop files on the box, paste them or choose them from your device. Nothing is uploaded.

  2. Check the settings

    The default preset suits most files. Change quality, size or format if you need a smaller file.

  3. Download the result

    Save each file or all of them as one ZIP. If a file cannot get smaller, you keep the original.

Document formats we compress

Why documents get so large

Text costs almost nothing. A novel of 100,000 words is well under a megabyte as plain text, and still small in a DOCX or a PDF. When a document is tens of megabytes, the weight is nearly always in the pictures: phone photos inserted at full resolution, screenshots from high-density displays, scanned pages, logos repeated on every page, or a video pasted into a presentation. Fonts embedded in the file and leftovers from editing come second.

That is good news, because pictures inside a document can be made much smaller without touching a single word, table or formula. The document compressor does exactly that.

What the tool does with each format

FormatWhat happens
PDFImages are downscaled to the chosen DPI and re-encoded; duplicates and unused objects are removed. Text stays text.
DOCX, XLSX, PPTX (also ODT, ODS, ODP)Pictures inside the ZIP container are recompressed, optional removal of embedded fonts and thumbnails, then maximum ZIP packing.
DOC, XLS, PPTThe old binary formats cannot be rewritten safely in a browser. You get a compressed ZIP of the original, or the advice to save as DOCX, XLSX or PPTX first.

Content is never changed: no text is retyped, no page is turned into a picture, and formulas, comments, tracked changes, animations and macros remain as they were. If a file cannot be made smaller, the tool tells you and keeps the original.

PDF presets and picture quality

For PDFs, three presets cover most needs, and Custom lets you set the resolution (72 to 300 DPI) and JPEG quality yourself:

  • Light only cleans up the file without changing a single pixel of any picture, for contracts and forms that must stay exactly as they are.
  • Recommended limits images to 150 DPI at JPEG quality 75: sharp on every screen and on office printers.
  • Strong limits images to 96 DPI at quality 60, for strict upload limits and documents read only on screen.

Office files use the same levels; the resolution is measured against the size at which each picture is shown in the document, and photo-like PNGs without transparency are converted to JPEG unless you turn that off. A picture shown across the width of a page needs about 1900 pixels for crisp printing, and far fewer for reading on screen; a 4000-pixel phone photo has much more than that.

Keep your original whenever a document is legally important. A digitally signed PDF loses its valid signature when it is rewritten, and archives that require PDF/A may reject a compressed copy.

Confidential documents stay on your computer

Contracts, payslips, medical letters, tax returns and unpublished reports are exactly the files people need to shrink for a portal or an email, and exactly the files they should not upload to unknown servers. Here, the document is opened and rebuilt in your browser tab. No copy is sent to us or anyone else; you can even disconnect from the internet once the page and the compressor have loaded, and it keeps working.

Document compression questions

Will compression change the text or layout of my document?

No. Only embedded pictures and the packing of the file change. Text, fonts in use, tables, formulas and the page layout stay as they are.

Why did my document barely shrink?

It probably contains few or no pictures, or they were already compressed. Text-only files are compact already. For scans and photo-heavy files the savings are much larger.

Should I send a PDF or the original Office file?

Send PDF when the recipient only needs to read or print, since it opens everywhere and looks the same on every device. Send DOCX, XLSX or PPTX when they need to edit it.

Can I compress password-protected files?

No. Encrypted PDFs and Office files cannot be opened without the password, and the tool will tell you so. Remove the protection in the original program, compress, and protect the result again.

See also

Read how it works for the details of in-browser processing, and check the file size limits of email services before you send.