Help center
Quick answers and links. For product questions we also maintain a FAQ on the homepage; each tool page has its own FAQ where relevant.
Upload issues
Use a supported PDF. If the upload fails, try a smaller file, ensure the file is not password-protected in a way the tool cannot open, and check your network. On some cloud hosts, very large request bodies (on the order of tens of MB) may hit platform limits—compress the PDF or use a direct API path if your deployment configures one.
Download issues
After processing, use your browser’s download prompt. If nothing downloads, disable pop-up blockers for this site and retry. If the server returns an error, note the message and try again with a smaller file.
File size limits
Limits depend on server configuration and hosting. If you hit a size or timeout error, compress the PDF, split it, or reduce embedded images. See also our homepage FAQ for general context.
Privacy questions
Read the privacy policy for how uploads are processed and retained. Only process documents you are allowed to use.
Browser support
Use a current version of Chrome, Firefox, Safari, or Edge. Enable JavaScript. Private/incognito mode may affect extensions or storage—if something fails, try a standard window.
Tool-specific guides
Open a tool from the full catalog. Each live page includes steps, limits, and an FAQ section. Suggested starting point: Add signature to PDF.
- Add signature to PDF — Use this page to place a handwritten or image signature on a PDF and download a new file—optimized for people searching specifically for signature workflows.
- Add stamp to PDF — This page targets stamp workflows: official seals, approval stamps, or round images you want repeated consistently across PDF pages using the same placement tools as signatures.
- Add logo to PDF — Optimized for branding tasks: place a company or product logo image on PDF pages with the same placement and multi-page controls as signatures and stamps.
- Batch stamp PDF — Focused on high-volume page coverage: one upload, one stamp placement pattern, then apply across many pages at once—ideal when “batch” is how you think about the job.
- Stamp PDF multiple pages — Written for searches about partial coverage—when you need a stamp on several pages but not necessarily the whole file.
- Apply stamp to all pages PDF — Targets whole-document intent: one stamp placement applied across every page in the file—common for approvals, confidentiality marks, and branding bars.