PDF Tools Study Tools — Study Tools Ninja

Organize & Merge

3 tools

Combine multiple PDFs into one file in your browser — reorder files, then download.

Reorder, rotate, delete, or extract PDF pages with thumbnail previews in your browser.

Rotate selected or all PDF pages and download a corrected file.

2 tools

Add text, highlights, shapes, and images as overlays on PDF pages in your browser.

Preview and apply text watermarks across PDF pages in your browser.

2 tools

Shrink PDF size with quality presets. Best-effort browser compression — results vary.

Convert PDF pages to PNG/JPG (ZIP download) or build a PDF from images.

1 tool

Count words and characters in a PDF locally, with optional OCR for scanned pages.