PDF Highlighter Tool

The PDF Highlighter Tool ingests a document and optional keyword list or manual selections, producing a highlighted copy of the PDF. It emphasizes passages without changing the underlying content, preserving layout, fonts, and images.

Conceptually, the tool separates input handling, domain logic, and output generation. It performs text extraction, matches terms with optional case sensitivity and stemming, and renders color-coded overlays on pages before exporting the final file.

Audience includes students, researchers, legal teams, and content creators who need to emphasize passages for study, evidence, or review. Its value lies in fast, repeatable annotations, lossless export, and easy sharing without altering the source file.

Core features include: file upload, multiple highlight colors, keyword and manual highlighting, per-page highlight control, and export of annotated PDFs. Use cases cover academic notes, contract review, policy documents, and literature reviews. The tool supports privacy-friendly processing options, ensuring data does not leave user-controlled environments when possible, and provides clear logs for traceability.