# PDF Overlay > Stamp a letterhead, watermark or digital paper onto every page of a PDF. Free, browser-based, no upload and no watermark of ours added. - URL: https://farvixo.com/tools/pdf/pdf-overlay - Category: PDF Tools (https://farvixo.com/tools/pdf) - Price: Free - Last reviewed: 7 August 2026 - Publisher: Farvixo Technologies ## What is PDF Overlay? PDF Overlay is a free browser-based PDF tool from Farvixo that lets you stamp a letterhead, watermark PDF or digital paper onto every page. It runs entirely on your own device using WebAssembly, so the document is never uploaded to a server. There is no sign-up, no watermark on the output and no cap on how many files you process. ## Specifications | Property | Value | | --- | --- | | Tool | PDF Overlay — PDF Tools | | Purpose | Stamp a letterhead, watermark PDF or digital paper onto every page | | Input | One or more files (PDF) | | Output | PDF file (plus the chosen export format where the tool converts) | | Processing | In your browser — files are never uploaded to a server | | Price | Free, unlimited, no account required | | Limitations | Bounded by your device's memory and CPU rather than a server quota; very large files may be slow on older hardware | ## How to use PDF Overlay 1. **Add your PDFs** — Drag your PDFs into PDF Overlay or click to browse. The files stay on your device — nothing is uploaded to a server. 2. **Set up the document** — Reorder, select page ranges and pick the output settings you need. PDF Overlay shows a live preview so you can check the result before committing to it. 3. **Save the finished PDF** — Download the new PDF straight away. No watermark, no page limit and no sign-up — run PDF Overlay as often as you need. ## Use cases - Preparing a document for an email attachment or an upload form with a size limit - Students and office workers who need one PDF change without buying a desktop editor - Handling contracts, invoices or ID documents that should not be uploaded to a third-party server - Cleaning up a scanned document before archiving or sharing it ## Tips - Check the page count and orientation in the preview before you download — reordering afterwards means starting over. - If a PDF refuses to open, it is usually password-protected; remove the password first, then re-run this tool. - Very large PDFs are limited by your device memory, not by an upload cap. Splitting a 500-page file into parts is faster than processing it whole. ## Common problems - **The PDF will not load** — The file is encrypted or was produced by a non-standard writer. Open it in a PDF reader, print it back to PDF, and try again. - **Text comes out garbled or as boxes** — The PDF has no embedded font or no text layer at all. A scanned page needs OCR first — use PDF OCR, then re-run this tool. - **The browser tab becomes unresponsive** — The document is larger than the available memory. Close other tabs, or split the PDF and process it in sections. ## FAQ ### What can I overlay? Another PDF page — typically a letterhead, a company template, a "DRAFT" or "CONFIDENTIAL" stamp, or a digital paper background. The overlay is applied to every page, or to a range you specify. ### Will the overlay hide my text? Not if it has transparency, which a proper letterhead PDF will. A solid-background overlay will cover what is beneath it. Set the overlay to sit behind the content if your stamp is opaque. ### Can I apply it to only some pages? Yes — enter a page range. This matters for letterheads, which conventionally appear on the first page only while continuation pages stay plain. ### Does Farvixo add its own mark? No. The only thing stamped on your document is the overlay you chose. There is no branding, no watermark and no page limit. ### What size should my overlay PDF be? The same page size as the document you are stamping. A different size is scaled to fit, which can shift a letterhead off its intended position — matching sizes avoids the problem entirely. ## Related tools - [PDF Converter](https://farvixo.com/tools/pdf/pdf-converter): Convert PDF to Word, Excel, PowerPoint, Images and more — or convert any file to PDF - [Merge PDF](https://farvixo.com/tools/pdf/merge-pdf): Merge multiple PDF files into one document — AI organize, optimize & premium merge modes - [PDF Compressor](https://farvixo.com/tools/pdf/compress-pdf): AI-powered PDF compression — smart modes, batch queue, quality reports & 100% private - [PDF to Word](https://farvixo.com/tools/pdf/pdf-to-word): Convert PDF to editable Word with AI layout repair, OCR, tables & Indic script support — 100% private - [PDF to Excel](https://farvixo.com/tools/pdf/pdf-to-excel): Convert PDF tables into editable Excel spreadsheets — dates, numbers and currency stay editable - [Image to PDF](https://farvixo.com/tools/pdf/image-to-pdf): AI-powered image to PDF — batch upload, organize, optimize & professional PDF output --- > Machine-readable index: [llms.txt](https://farvixo.com/llms.txt) · full corpus: [llms-full.txt](https://farvixo.com/llms-full.txt) · agent skill: [skill.md](https://farvixo.com/skill.md). 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