Hallo PDF Help & Guides
Step-by-step guides for getting things done with Hallo PDF — all in your browser, with your files staying on your device.
How to edit a PDF
Change existing text, add new text and shapes, and rearrange pages — free.
How to redact a PDF
Permanently remove sensitive text and regions so they can't be recovered.
How to merge & split PDFs
Combine multiple PDFs or pull pages out into a new file.
How to sign a PDF
Digitally sign with a certificate generated on your device — and verify existing signatures.
How to fill out a PDF form
Fill fields directly on the page, add your own fields, flatten, and export the data.
How to OCR a PDF
Make scanned pages searchable and copyable — OCR runs locally, no cloud.
How to compress a PDF
Shrink a file losslessly: drop unused objects and recompress streams.
How to watermark a PDF
Stamp text across every page — size, angle, colour, and opacity.
How to add page numbers
Number every page — position, format, start number, even Bates numbering.
How to convert PDF to Word
Export an editable .docx on your device — no upload, no email gate.
Why Hallo PDF?
- Private by design — files are processed in your browser and never uploaded. Learn more.
- No install, no account — open a PDF and start editing.
- Free — supported by ads so it can stay free.