Marking important information in your document is highly intuitive. Follow these steps:

Step 1: Upload your PDF document to our secure online reader.

Step 2: Select the "Highlighter" tool from the top menu and pick your preferred color.

Step 3: Click and drag your cursor over the text you want to highlight.

Step 4: Click "Apply Changes" and download your newly annotated PDF file.

Highlight Text in PDF - Mark Important Text with Various Colors Free Online

Reviewing lengthy digital documents, study notes, or dense legal contracts can be exhausting if you cannot visually mark the most critical information. Our free online Highlight Text in PDF tool brings the convenience of a physical neon marker right to your web browser. Whether you are a student color-coding research materials, a lawyer emphasizing specific clauses in an agreement, or a team leader pointing out key data in a quarterly report, our intuitive tool makes digital annotation fast, clean, and highly effective.

Unlike clumsy drawing tools that leave messy, crooked lines, our smart PDF highlighter automatically detects the text blocks in your document. This ensures that your highlights snap perfectly to the text, resulting in a neat, professional appearance. You can easily switch between multiple bright colors to categorize your notes and improve reading comprehension. There is no need to download or install expensive PDF viewer software; everything happens instantly online. Furthermore, we guarantee enterprise-level security. Your sensitive documents and personal notes are encrypted and automatically deleted from our secure cloud servers shortly after you download your final file.