Grayscale PDF
Convert every page to black and white — handy for printing and portals.
Runs in your browser — your files are never uploaded.
Pages are re-saved as images (150 dpi), so text can no longer be selected.
Working…
Questions
Will the file get smaller?
Usually, for colourful scans. Text-only PDFs may grow slightly.
Are my files uploaded?
No. The tool runs inside your browser. Your PDF never leaves your device and is not sent to Accohub or anyone else — you can even disconnect from the internet after the page loads.