PDF Overlay - 2026 Pricing, Features, Reviews & Alternatives

PDF Overlay is a browser-based application that enables the addition of text, images, watermarks and Bates numbering to PDF documents within the browser environment. The software processes documents locally on the user’s device in order to preserve document privacy and security. PDF Overlay is designed to support legal professionals, business and finance teams, and organizations that require precise document stamping, sequential numbering and branding for contractual, discovery and official reporting workflows. The tool operates without requiring account creation or software installation.

The application supports three types of overlays: text elements, image placements and stamp blocks. Text overlays accommodate multi line content with actual line breaks and formatting options such as bold, italic, underline and strikethrough. Users can fully customize the size, rotation, color and opacity of text overlays and position them by direct manipulation on the live preview or by specifying exact coordinates for consistent placement across multiple documents. Image overlays accept common file formats and maintain aspect ratio during resizing. Watermarking is achieved by adjusting overlay opacity and angle and by selecting placement on top of or behind existing page content. The Bates numbering feature generates sequential identifiers with a customizable prefix, a padded counter and a suffix and allows the combination of confidentiality legends, dates and page counts within a single stamp block.

The live preview displays the entire document with overlays rendered on every selected page so that the final output can be reviewed without executing a save and check cycle. Users can define page selections in terms of all pages, individual pages, odd or even pages or custom ranges and apply overlays accordingly. Font management includes several built in typefaces and support for uploading custom font files that are stored locally in the browser. Configuration management enables saving named overlay settings including position, size, color, font and complete numbering schemes for reuse in subsequent sessions.

All processing occurs client side within the browser so that no document data is transmitted to external servers and no server side storage is required. The tool requires no network connectivity once the interface has loaded and relies entirely on local system resources for processing. Overlays placed on top of existing content preserve hyperlinks, annotations, form fields and metadata in the output. Overlays positioned behind the page content necessitate a document rebuild and replace existing page layers. This process removes hyperlinks, annotations and form fields and remains transparent to the user. The output consists of new PDF files that incorporate the specified overlays while leaving the original documents unmodified.