Construct PDFOnline
Desktop app RU

Compress PDF online

Shrink a PDF for email or an upload portal. See the size of each option in advance, or just set a limit in megabytes.

Drop a PDF here or click the button

Files are processed on your computer and are never uploaded. Need it offline? Download Construct PDF for Windows

How to compress a PDF

  1. Open a PDF — the compression window opens automatically.
  2. Pick an option by size or type “Not larger than, MB”.
  3. Click “Download”.

Why Construct PDF Online

  • Files never leave your computerDocuments are opened and processed in your browser. Nothing is uploaded — safe for contracts and IDs. The only exception is Word, Excel and PowerPoint to PDF: only with your consent, and the file is deleted right away.
  • No sign-up, no watermarksOpen a file and start working. No file limits and no “made with …” marks on your pages.
  • Cyrillic and LatinText and stamps support Cyrillic and Latin; forms are filled in; compression fits upload portals.
  • Desktop app for WindowsConstruct PDF for Windows works offline: edit scanned text, CryptoPro e-signature, OCR.

More tools

Questions and answers

How do I compress a PDF to 1 MB or 2 MB?

Type the number into “Not larger than, MB”. The editor picks the best-quality option that fits.

Will text get blurry?

Images inside the PDF are compressed; text stays sharp and searchable.

Why does the file not get smaller?

A text-only PDF is already compact. Scans and photos shrink the most.

Is it safe?

Yes. Compression runs in your browser and the file is never uploaded.

Like Construct PDF?

The service is free. Support the project or tell us what is missing — we read every message.

All tools

Choose what to do. The tool opens over the current document, or asks for files if none is open.

Drop to open
Opening…

This file is password-protected