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Vizua

Compress PDF Online — Rasterized Pages

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Supports: PDF

Compression rasterizes each page. Selectable text, links, forms, signatures, and layers may be lost; size reduction varies. Password-protected files prompt for a password.

How to Compress PDF File Size

Vizua is a free online PDF rasterizer and recompressor. The selected PDF is processed in your browser and is not sent to Vizua's image-processing server. The page can still make network requests for required code and worker assets, analytics, advertising, error monitoring, and other site features described in the privacy policy.

Drop a PDF into the area above, choose the raster resolution and JPEG quality, then compare the result. The process may reduce some image-heavy files, but it can also increase size or make content harder to read. It permanently flattens each page and does not preserve selectable text, links, forms, signatures, layers, or document accessibility.

Why Compress PDF Files?

  • Email attachments — test whether the generated file fits the recipient service's current attachment limit
  • Uploads — a genuinely smaller result can transfer faster to forms, portals, or storage services
  • Storage experiments — compare rasterized copies of scanned or image-heavy documents while retaining the original
  • Web publishing — evaluate file size, legibility, accessibility, and structural loss before publishing the derivative

How PDF Compression Works

Vizua renders each page at the selected resolution, encodes the rendered raster as JPEG at the chosen quality, and assembles those images into a new PDF. This approach can help some scanned and image-heavy documents, but a smaller file is not guaranteed. The new document is an image-only representation of the rendered pages, not a structure-preserving optimization of the source PDF.

Local PDF Processing

The selected PDF is rendered and rebuilt on your device rather than uploaded to an image-processing server. The site still makes ordinary requests for its code, worker assets, analytics, advertising, and error monitoring as described in the privacy policy.

Frequently Asked Questions

How does PDF compression work?

Vizua renders each PDF page to a raster at the selected resolution, encodes that page as JPEG at the selected quality, and builds a new image-only PDF. This can reduce an image-heavy file, but it can also produce a larger output and removes selectable text, links, forms, signatures, layers, and other document structure.

Will text remain selectable after compression?

No. The rebuilt PDF contains rendered page images, so text is no longer selectable or searchable as characters. A higher quality or resolution can improve raster legibility, but it does not restore semantic text, links, accessibility, forms, signatures, or layers. Inspect every page before relying on the output.

What quality setting should I use?

There is no universal setting. Lower JPEG quality and resolution can reduce size while increasing blur, artifacts, and text damage. Higher settings can improve the rendered appearance but may create a larger file. Compare several outputs, inspect small text and diagrams at high zoom, and retain the original.

Is there a file size limit?

The practical limit depends on the file size, page count, document complexity, available browser memory, and device limits. Large PDFs may take longer or require a smaller batch.

Is my PDF uploaded to a server?

The selected PDF is processed in the browser and is not sent to Vizua’s document-processing server. The page can still make network requests for required code and worker assets, site features, analytics, advertising, and error monitoring as described in the privacy policy.

How much smaller will my PDF get?

There is no reliable percentage. The result depends on the source pages, existing compression, selected resolution and quality, page count, and browser encoder. An output can be smaller or larger than the original, so compare the actual sizes and inspect the rendered pages.

What you can do with Compress PDF Online — Rasterized Pages

Compress PDFs locally by rasterizing pages. Size reduction varies; selectable text, links, forms, signatures, and layers may be lost.

Compress PDF Online — Rasterized Pages is designed for quick, repeatable work in a modern browser. The controls on this page let you prepare the result without installing software or creating an account.

How to use Compress PDF Online — Rasterized Pages

  1. Select or drop the file you want to process, or enter the information requested by the tool.
  2. Review the available settings before processing, especially format, dimensions, quality, color, or other details that affect the output.
  3. Inspect the result, download the new file, and keep the original unchanged in case you need another version.

Private by design

Your files never leave your device. All processing happens locally in your browser.

Tips for better results

  • Start with the cleanest source available; a small, blurry, or heavily compressed file contains less detail to preserve.
  • Check dimensions and format before downloading so the result matches the site, app, printer, or platform where you will use it.
  • For large files, close unnecessary tabs and test one representative file before processing a full batch.
  • Open the downloaded result once before sharing it or replacing an original.

Where Compress PDF Online — Rasterized Pages fits in a workflow

Use Compress PDF Online — Rasterized Pages for one-off adjustments or as a preparation step before publishing, sharing, archiving, or continuing the edit in another application. When batch processing is available, validate the settings on a small sample first and then apply them to the remaining files.