Lock PDF
Protect a PDF with a password using strong AES-256 encryption. The file and the password are never uploaded.
- Choose file
- Choose option
- Download
Choose a PDF
PDF · up to 50 MB
Processed in your browser — never uploaded
Opening your file…
Choose what to do
Preview
Check your form's exact requirement
Use the DPI your form asks for (300 is a common choice).
KB limits apply to JPG. PNG files can't be squeezed to a KB size.
Higher removes more shadows and faint marks. Lower keeps light pen strokes.
Keeps your image's width and height. Only if the file still doesn't fit, it is made a little smaller.
Keeps the same width and height. PNG is lossless (larger files); transparent areas become white in JPG.
Drag the box to choose the area, rotate if needed. The result keeps full resolution.
We try the best quality first and stop at the first one that fits.
Pages are saved as images, so text can't be selected or searched afterwards. Best for scans and photo PDFs.
Pages are scaled to fit without stretching. Text stays sharp and selectable.
Files, in this order
Pages keep their sharp text and size. Use the arrows to change the order.
Images keep their colours and shape; photos are turned upright automatically.
Headings, paragraphs, lists and bold text you can edit. Scanned pages come in as pictures.
Every page becomes one slide that looks exactly like the PDF, in colour. The page's text goes into the speaker notes.
Every page is laid out on your device and saved in colour, with text you can select and search. Fonts this device doesn't have are replaced by similar ones.
Every slide becomes one PDF page, in colour, with text you can select. Hidden slides are left out, like in a slide show.
Scripts in the page don't run. Pictures from other websites are included when they load within a few seconds.
Keep the password safe: nobody — not even GoToolVerse — can open the PDF without it.
Leave it empty if the PDF opens without a password but blocks printing or copying.
150 DPI — sharp on screens, small files
Several pages download together in one ZIP.
Tap pages below or type them. They go into one new PDF.
Your file is ready
- File size
- Before
- Size
- Format
How it works
Step 1
Choose a PDF
Any PDF up to 50 MB. It is never uploaded.
Step 2
Set a password
Type it twice. Optionally block copying and editing too.
Step 3
Download
A PDF that asks for the password before it opens.
Tips for PDF passwords
- A few random words make a strong password that's easy to remember.
- Share the password separately from the file — for example by phone or message.
- Forgot it? Nobody can recover it, so keep a copy somewhere safe.
Questions
How do I put a password on a PDF?
Choose the PDF, type a password twice and tap Lock PDF. The downloaded PDF asks for that password before it opens, in any PDF reader.
How strong is the protection?
It uses AES-256, the strongest encryption PDF readers support. A long password (a few random words) makes it practically impossible to open without the password.
What does "Also block copying and editing" do?
People who open the PDF with the password can read and print it, but PDF readers won't let them copy text or change it.
I forgot the password. Can you recover it?
No. The password is never sent to us or stored anywhere, so nobody can recover it. Keep a copy somewhere safe.
Is my PDF or password uploaded?
No. The PDF is locked in your browser; neither the file nor the password leaves your device.