Dashboard User Manual
100% Private • No Server Uploads

Edit PDFs Online Free - 100%
Private, No Uploads

The only PDF editor that runs entirely in your browser. Edit text, sign, and annotate. Your files never leave your device.

Drop your PDF here

or click to browse files

Direct Content Stream Manipulation • Processed locally
No Account Needed No Watermarks Works Offline

How to Use the Editor

A quick, simple guide to mastering the tools

Change Existing Text

Click the Select or Edit Text tool, then click any text on the page to change it. You can fix typos or rewrite whole paragraphs just like in a Word document.

Add New Items

Use the Add Text button to type something new. You can also click Images or Shapes to insert pictures, boxes, lines, and arrows.

Highlight Text

Click the Highlight tool, pick your favorite color, and drag your mouse over any text to make it stand out.

Sign Documents

Click Signature to easily sign the PDF. You can type your name in a stylish font, draw it with your mouse, or upload a photo of your signature.

Save & Download

When you are happy with your changes, click the Save button at the top right to download your finished PDF to your device.

100% Secure

You don't need to worry about privacy. Everything you do happens right on your computer. We never see, copy, or save your files.

Who Is This For?

Our PDF Editor is designed for everyone who handles digital documents

🎓 Students & Educators

Easily fill out assignment forms, highlight study materials, add notes to lecture slides, and organize research papers without paying for expensive software.

💼 Business Professionals

Sign contracts, redact sensitive information, update business proposals, and correct invoice details instantly while keeping all company data securely on your device.

📝 Freelancers & Creatives

Modify resumes, update portfolios, sign NDAs, and tweak client presentations on the go from any device, without needing to create an account.

🏠 Everyday Users

Fill out tax forms, sign medical documents, or edit rental agreements securely from the comfort of your home browser.

Our Privacy Promise

Your documents belong to you, and only you

No Data Collection

We do not log, store, or transmit your files. Everything is processed locally within your browser.

Zero Server Uploads

Your files never touch our servers. There is no cloud processing, no backup, and no hidden data transfers.

No Account Required

We don't ask for your personal information. Use the tool instantly without creating an account or accepting tracking cookies.

Client-Side Architecture

We architected this tool so there is nothing to steal. We never possess your files or data.

Frequently Asked Questions

Everything you need to know about our PDF Editor

Simply click on "Choose PDF File" to open your document directly in your browser. Our tool allows you to modify text, highlight, add images, and draw shapes entirely for free. Everything works directly on your device without requiring you to pay or create an account.

Yes, absolutely. Our editor is entirely client-side, meaning your files are never uploaded to any server. All processing and editing happen locally within your browser, ensuring complete privacy and security for your sensitive documents.

Unlike many basic online PDF tools that only let you add text boxes over the document, our advanced editor parses the raw PDF content stream, allowing you to select and modify the existing text directly in-place without destroying the original formatting or layout.

Yes, our tool is fully cross-platform and responsive. It works seamlessly on modern web browsers across Windows, macOS, Linux, iOS, and Android devices, allowing you to edit PDFs on the go or from your desktop.

Select the "Signature" tool from the top toolbar (or bottom menu on mobile). You will be given the option to type a signature using a stylized font, draw your signature with your mouse or finger, or upload an image of your signature. Once placed, you can move and resize it anywhere on the document.

No. We believe in providing a clean, professional editing experience. Your exported PDF will not have any added watermarks, logos, or branding, no matter how many files you edit.

UniDoc PDF Editor comes packed with powerful features to cover all your PDF editing needs, including:

  • Direct Text Editing: Unlike basic editors, our tool directly modifies the underlying PDF content stream. You can rewrite existing text blocks in-place without destroying the original document structure.
  • Add & Format Text: Insert new text blocks anywhere with full control over font family, size, color, weight, and alignment.
  • Add Images & Shapes: Easily drag and drop images or draw customizable shapes (rectangles, circles, lines, arrows) onto your pages.
  • Highlighting & Annotations: Mark up important sections with an adjustable highlighter tool.
  • Electronic Signatures: Sign documents by typing, drawing with your mouse/touchscreen, or uploading an image of your signature.
  • 100% Client-Side Processing: Your files never leave your device. All editing is done securely in your browser without any server uploads, ensuring total privacy.
  • Cross-Platform Compatibility: Works natively on Windows, macOS, Linux, and mobile devices right in your web browser.
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