Edit existing PDF text
Click any line to rewrite it. Mingtrove matches the original font style, size, colour and position, so the change blends in.
Mingtrove
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Free online PDF editor
Password-protect a PDF with real encryption.
Lock a PDF with a password so nobody can open it without one, or allow opening but block printing, copying and editing. Mingtrove uses AES-256, the same standard as Acrobat, and the file never leaves your device.
Continue where you left off ·
or drop PDFs and images anywhere on this pagePDFs and photos from your device
- Files stay on your device
- Free, no sign-up, no watermark
- Works offline, phone or desktop
Pick a tool
How to protect a PDF online
- Choose the PDF. Pick the document to protect.
- Set the passwords. A password to open the file, a permissions password that restricts what others can do, or both.
- Download. The encrypted PDF opens in Acrobat, Preview, Chrome and every other modern reader.
A free PDF editor with everything you need
Sign PDFs
Draw, type or upload your signature and place it anywhere. Signatures are saved on your device for next time.
Fill PDF forms
Type into fillable fields, or add text, ticks, crosses and dates to forms that aren’t fillable. Form fields keep working after you download.
Redact for real
Black out names, numbers and addresses. Redacted pages are flattened, so the hidden content is removed from the file, not just covered.
Compress PDFs
Shrink big PDFs by resizing the photos and scans inside them, with a choice of quality. Text stays sharp, and you see how much you saved.
Unlock PDFs
Open a password-protected PDF with its password and save a copy without the password. The text stays real text.
Merge PDFs
Combine several PDFs and photos into one file. Put them in any order, then download the result or keep editing it.
Split PDFs
Split a PDF into single pages, equal parts or custom page ranges like 1-3, 4-8. The parts download together as one ZIP.
Reorder & organise pages
Drag pages into order, rotate, duplicate or delete them, insert blank pages and extract pages into a new file.
Annotate & mark up
Highlight passages, draw freehand, add boxes, arrows, whiteout, page numbers and watermarks.
Password-protect PDFs
Lock your PDF with AES-256 encryption: require a password to open it, or block printing, copying and editing.
Private by design
Your PDFs never leave your device: there are no uploads and no account. Your work is autosaved locally so you can pick up where you left off.
Frequently asked questions
What is the difference between the two passwords?
The open password is needed to view the file at all. The permissions password lets the file open freely but blocks printing, copying or editing until it is entered.
How strong is the encryption?
AES-256, the strongest level in the PDF standard. Without the open password the content cannot be read.
Can I recover a password I forget?
No. Mingtrove never stores passwords, so keep a note of it.
Do all PDF readers respect the restrictions?
Mainstream readers do. The open password is the real protection; permission restrictions depend on the reader honouring them.