Tips, tutorials, and guides for working with PDF files
Cross out text in a PDF online for free. Select existing text, choose a color, export the marked-up PDF, and fix common scanned-file issues.
Turn JPG, PNG, or photo scans into one PDF, choose page size and margins, and keep image order clear before sharing or printing.
Export PDF pages as JPG or PNG, pick the right resolution, and decide between separate page images or one long image for sharing.
Add a password to a PDF before sharing, understand opening passwords versus permission controls, and avoid locking yourself out.
Combine multiple PDFs into one file, reorder documents before merging, add separator pages when useful, and check the final file.
Add page numbers after checking page order, cover pages, starting number, and placement so the finished PDF is easy to review and print.
Save selected PDF pages as a new file, check page ranges before exporting, and keep the original document untouched for later use.
Crop PDF pages safely by trimming scanner borders, white margins, or photo backgrounds while checking signatures, footers, and page numbers.
Learn how to delete pages from a PDF online for free, remove one unwanted page or several pages, and save a clean file without sign-up or uploads.
Remove a known PDF password online with OnePDFs. Free, no sign-up, step-by-step screenshots, and a clear limit: this is not password cracking.
Detect personal data locally with OpenAI's privacy-filter model, review each candidate, and add visual black covers that require export verification.
Add a visible electronic signature to a PDF online. Draw, type, or upload it locally, then verify the downloaded file before sending.
Compress a PDF to 100KB, 200KB, 500KB, or 1MB online. OnePDFs reduces file size in your browser without uploads or signup.
Add text or image watermarks to PDFs online with OnePDFs. Adjust opacity, rotation, position, page range, preview, and download the finished PDF.
Remove repeated text, image, layer, and annotation watermarks from a PDF in your browser. Detect, review, confirm, download, and verify every page.