Blog: PDF editing guides
Practical, no-nonsense articles from the blupdf team.
2026-09-08 · 5 min read
How to change the numbers on a PDF invoice or order and keep the totals right
Fix a quantity, price or discount on a PDF invoice or quote without breaking the maths: retype in the original font, or let blupdf AI recompute the totals.
2026-09-08 · 5 min read
How to turn a scanned PDF into an editable Word file without retyping it
A scan is a picture of text. How to recognise it, fix the misreads and download an editable DOCX or a searchable PDF, and the scan-quality rules that matter.
2026-09-08 · 5 min read
How to write a lease, NDA or contract with AI and get a real PDF back
Describe the agreement in a sentence, get a drafted PDF with clauses, blanks and signature lines in 30 seconds, revise in chat, fill in the facts and sign.
2026-09-08 · 6 min read
How to fill in a PDF form online, even one with no form fields
Most PDF forms are printed layouts with blanks, not fillable fields. How to fill one in online in the form's own font, even a scan, and download a clean copy.
2026-09-08 · 5 min read
How to sign a PDF online for free: draw or type it, place it, download
Sign a PDF in the browser in under a minute: draw or type your signature, click the signature line, add the date and download a copy any viewer shows.
2026-08-27 · 6 min read
Best AI PDF editors in 2026: what actually matters
How to judge an AI PDF editor in 2026 - OCR, font matching, re-wrapping, searchable export, privacy - with a fact-checked look at seven tools including blupdf.
2026-08-27 · 4 min read
How to edit a PDF in the same font (and why editors get it wrong)
Why edited PDF text so often looks off, how fonts really live inside a PDF, what 'same font' means with subset fonts, and how blupdf matches fonts.
2026-08-27 · 5 min read
How to edit a scanned PDF (OCR first, then retype in a matched font)
A scanned PDF is a picture of text. Here is how OCR makes it editable, what scan quality does to accuracy, and how to retype text on a scan so it blends in.
2026-08-27 · 5 min read
How to edit text in a PDF without breaking the layout
A practical guide to editing PDF text: why PDFs are hard to edit, what breaks the layout, and how an AI PDF editor retypes text in the original font.