High-Res Page Inspector - Free Online Browser Tool

Zoom up to 400% to inspect vector graphics and small text.

At 400% you can check whether a vector diagram is genuinely vector, whether a logo has visible pixelation, and whether fine print was rasterised by whoever produced the PDF. This tool zooms hard and reports what it finds, which is how you judge the real quality of a document.

This high-res page inspector utility runs completely inside your web browser. Your document is opened locally and processed on your own device using JavaScript and WebAssembly, so your file is never uploaded to any server. There is no signup, no watermark and no limit on how many documents you can handle.

  • 100% client-side - files never leave your device
  • Instant processing, no upload wait
  • Works on desktop, tablet and mobile
  • Free forever, no account required

Common next steps: Online PDF Viewer, Extract Embedded Photos, Compare PDFs Visually.

How to Use the High-Res Page Inspector Tool

Four steps, and the whole thing runs locally on your own device.

  1. Load the PDF

    Drop in the document you need to examine closely.

  2. Zoom in hard

    Magnify to 400% and move across the page, examining line edges, small text and image detail.

  3. Assess the quality

    Sharp continuous edges indicate vector content. Visible pixel blocks indicate a low-resolution raster image.

  4. Record your findings

    If the page is a rasterised image, use Compress or convert the source properly rather than relying on magnification to fix it.

Frequently Asked Questions

How do I tell vector text from rasterised text?

Zoom in. Vector text produces smooth, continuous edges at any magnification. Rasterised text shows square pixels growing as you enlarge it.

Why does some text look sharp and other text blocky on the same page?

Common in exported documents — live text stays vector while text that was flattened into an image elsewhere on the page is raster. Zoom in on each to compare.

Can I fix an image that is pixelated when zoomed?

No, and it is worth being clear about that: magnifying reveals existing pixels and cannot invent detail. Only going back to a higher-resolution source fixes it.

Does zooming load the whole document into memory?

Only the visible pages render, so large documents remain workable. Rendering is still the slow part, and progress is shown per page.

What is 400% enough to establish?

Enough to judge whether content is vector or raster, and whether an embedded image is reasonably high resolution. It cannot recover quality that was never there.