Convert color PDFs to grayscale for cheap B&W printing and smaller files. Cut a 50-page deck's print cost in half — local processing, unlimited saves.
Content reviewed October 2026 · About Toolzum
Lock PDFs with user and owner passwords — control opening, printing, and copying. Protect 10 client files before sending — local pdf-lib encryption, unlimited saves.
Sign PDFs electronically — draw, type, or upload signature images onto any page. Execute a 5-page agreement without printing — local pdf-lib + canvas, unlimited saves.
Print multiple PDF pages per sheet — 2-up handouts, 4-up booklets, 6-up slides. Fit a 60-slide deck on 10 sheets — local processing, unlimited saves.
Grade videos with 18 filters across Color, Artistic, Blur, and Lighting (grayscale, sepia, pixelate, gaussian blur, vignette, brightness/contrast/saturation) plus a live still-frame preview. Export MP4, WebM, or GIF — local FFmpeg work, unlimited saves.
Shrink MP3 files by lowering bitrate with quality presets — fit podcasts into feed limits. Cut a 50 MB episode to 15 MB cleanly — local FFmpeg work, unlimited saves.
B&W prints cost a fraction of color per page — a 50-page deck drops from color rates to mono rates, often halving the bill. Convert the print copy, keep a color master.
Mostly — but red/green distinctions collapse to similar grays. Check one chart page after converting; patterned fills survive better than color-only coding.
Yes, typically 20–40% — single-channel data compresses better. Archive the grayscale copy for email and keep color for presentation.
No — conversion runs locally in your browser. Only the final save touches the network — downloads are unlimited.
Flatten PDF
Bake fillable form fields and annotations permanently into page content — lock applications before sending. Freeze a signed offer letter exactly as seen — local pdf-lib, unlimited saves.
PDF Cleanup
Remove blank pages, embedded junk, and bloat from PDFs in one pass — compress, clean, and standardize. Shrink a bloated 80 MB archive for sharing — local work, unlimited saves.