What is free, and what costs money
Reading your document, finding the text, checking whether the edit is possible and looking at the finished page are all free. The document itself is $2.
Edit the text in your PDF
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1
Choose your document
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Say what should change
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3
See it, then download it
What is free
Most of what this tool does costs nothing. Upload a document and you are told what it is made of, which fonts it carries and how many characters each of them can write. Say what you want changed and you are told whether it can be done, in every place that text appears, and if not, exactly which character is missing. Then the edit is made and the finished page is shown to you as a picture.
All of that is free, permanently, so you can see whether this document can be fixed at all before you pay. Sometimes the answer is no, and you should be able to find that out without paying.
What costs $2
The edited PDF. One document, every correction it needs, no subscription and no account. If you have several to do, 10 cost $10 — see pricing.
Other ways to edit a PDF
There are free PDF editors. Most work by rebuilding the page, which gives back a document that resembles yours with different line breaks and a substituted font. Others paint a white box over the old words and draw new ones on top, which leaves both versions in the file and shows both layers as soon as someone selects the text. If either is good enough for what you are doing, they will cost you nothing and you should use them.

Questions
Is the free part limited to a number of documents?
Is there a watermark?
What do I get for $2?
Is there a free trial?
One document
$2each
- No subscription and no account
- Every correction that document needs
- Checking is free, always
Ten documentsBest value
$10$1 each
- No subscription — buy once, use whenever you need them
- They do not expire
- Half the price of buying them one at a time
Everything it can change
Change any text
Swap a phrase for another one, in the font already there.
Fix a typo
A word came out wrong and the rest of the page is fine.
Change an address
Three or four lines of an address block, changed together.
Change a date
A date that needs to read differently, without shifting the line.
Change a name
A misspelt name, or one that has changed since.
Keep the same font
Replace text without a font substitution anywhere on the page.
Change a number
An amount, a reference, an account number — digits for digits.
Remove a word
Remove text without breaking the layout.
Add a signature
Put a signature image on the page without covering what is under it.