How it works
The PDF Blank Page Remover scans every page of a PDF by rasterizing it at 50% scale and analyzing the pixel data: pages where more than 99% of pixels are near-white (RGB ≥ 245) are classified as blank and removed from the output. The non-blank pages are assembled into a new PDF in their original order.
When blank pages appear: printers, scanners, and copy machines often insert blank pages at the end of odd-page documents to align duplex printing. Some applications (Word, LibreOffice) add a blank final page when the last paragraph ends with a forced page break. PDF concatenation tools sometimes introduce blank separators between merged documents. Automated form systems generate blank second pages when the form data fits on one page.
Detection threshold: the 99% white pixel threshold is conservative — pages with very light content (faint headers, subtle watermarks, light gray borders) are correctly classified as non-blank. Only pages that are entirely or almost entirely white are removed. If a lightly watermarked page is being incorrectly detected as blank, no current control adjusts the threshold — the tool is designed for clearly blank pages.
How to use it: upload your PDF and click Remove Blank Pages. The tool renders each page as a canvas at 50% scale, checks the pixel data, identifies the blank pages, builds a new PDF with only the non-blank pages, and downloads it. The result includes a summary of how many pages were removed.
Privacy: page rendering and analysis use PDF.js and pixel data operations entirely in the browser. No page images or content are uploaded.
Frequently Asked Questions
- A page where more than 99% of pixels are near-white (RGB value ≥ 245 in all channels) when rendered at 50% scale. This threshold handles common cases: truly empty pages, pages with only a page border frame (light gray lines ≤ 245), and pages with only a very light header line. Pages with visible text, gray watermarks, or colored backgrounds are not removed.
- If a page has only very light content — a faint watermark, a nearly-invisible header, a light gray background — it may fall above the 99% white pixel threshold and be classified as blank. The tool's threshold is fixed at 99% and cannot be adjusted. For problematic PDFs, manually verify the output page count and use the PDF Page Extractor to restore removed pages from the original if needed.
- Not directly — the tool processes the PDF and downloads the result. You can inspect the result summary (how many pages were removed) after processing. For a review workflow, use the PDF Thumbnail Sheet tool first to visually identify which pages appear blank, then use the PDF Page Extractor to manually specify which pages to keep.
- In the output PDF, pages are renumbered sequentially from 1. If the source PDF had pages 1, 2 (blank), 3, 4, the output has pages 1, 2, 3 in their original content order — the formerly-page-3 becomes page 2 in the output. Any internal links or bookmarks that reference specific page numbers by index may point to wrong pages after blank page removal.