Make read-only fields editable
The tool runs one operation whose purpose is to make the form fields in your file editable again. Fields that refused input before can then take new values.
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or drop a file anywhere here
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Files other than PDF are converted first. Signing in raises the size limit.
Or start from a blank IRS form
Browse all IRS forms →- You add
- One PDF with locked fields
- You set
- Nothing, it runs as it is
- You get
- A PDF with editable form fields
A PDF form can mark its fields as read-only. The boxes are still there and may already hold values, but a reader will not let you type in them. Unlock Forms sends your PDF through one operation that makes its form fields editable again and returns the result as a new PDF. There is nothing to set: add the file, press Run Unlock Forms and download the copy. Once the fields accept input, you can complete the form in your PDF reader or in Fill PDF Form. One form runs without an account. This tool deals with locked fields only. It is not a password remover, which is the job of Unlock PDF, and it does not fill the form for you. Use it on forms you own or have permission to change.
What can you do when you unlock a PDF form?
Run it without any settings
Under Options, Unlock Forms lists the output format, PDF, and nothing else to choose. The whole document is processed in one pass, with no field list to tick and no password to enter.
Fill the form straight afterward
Fill PDF Form disables the box of any field the PDF marks as read-only. Unlock the form here first, then upload the unlocked copy there and type your answers.
Get an error, not a silent failure
When the unlock operation fails, the job stops and the page reports that it could not process the file. No download is offered in that case, so you are never handed a file the tool did not finish.
What unlocking forms keeps and what it changes
Stays the same
- Page content and the look of the pages.
- Values already typed into fields.
- Page count and page order.
- The file on your device.
Changes
- The read-only flag is cleared on every form field, so a field that refused input can take it.
- A field's lock entry, which fixes its settings, is removed.
- The form is marked so a viewer redraws the field appearances.
- Where the form uses XFA, read-only access settings are changed to open.
- No field is added, and none is filled in.
How to unlock a PDF form in 3 steps
Add the PDF with locked fields
Drop the locked form on the upload box, or press Choose file and select it. The unlock takes one PDF per run, and Replace lets you swap a wrong file.
Press Run Unlock Forms
There is no option to choose first. Start the unlock and wait until the page says your PDF file is ready.
Download and test the form
Choose Download, open the copy and click into a field that was locked. If it takes your typing, carry on in your reader or in Fill PDF Form.
Why unlock a PDF form with indox?
Several different things can stop you from typing into a PDF form, and indox keeps a separate tool for each. A password that blocks opening the file belongs to Unlock PDF. Document permissions, including the Allow filling forms setting, belong to Change Permissions. Fields that are individually marked read-only belong to this page. Because of that split, Unlock Forms asks for nothing: no password, no field list and no settings. It also fits into a short chain of form tools. Unlock the fields here, type your answers in Fill PDF Form, and fix them in place with Flatten PDF when they are final. A single run needs no account, your form travels over HTTPS, and on the free tier indox deletes the upload and the unlocked copy automatically within 24 hours after the job finishes.
- Made for locked form fields only
- No password box, no settings
- Failed jobs end with an error
- No sign-in for a single form
- Free-tier copies deleted within 24 hours
What are the limits when you unlock a PDF form?
- Size
- The free tier has a file size limit. Signing in raises it, and paid plans raise it further.
- Formats
- This tool works on PDF files. To change a file's type, use the PDF converter.
- Privacy
- Files are encrypted in transit and processed on indox infrastructure.
- Deletion
- Free-tier files are deleted automatically within 24 hours after the job finishes. Signed-in output stays in your history for your plan's retention period.
Limits worth knowing
- Unlock Forms is not a password tool and has no password box. If the PDF asks for a password before it shows any page, run Unlock PDF first with the password you know.
- The page does not list which fields were locked or what it changed. Test the copy yourself, or upload it to Fill PDF Form and see which boxes are still disabled.
- The tool cannot create fields. A scanned form or a flattened PDF has no fields left to unlock, so it stays uneditable.
- The whole document is processed at once. You cannot unlock some fields and leave others locked.
- Authors lock fields for a reason, such as protecting totals or approved values. Unlock only forms you own or are authorised to change.
When the result is not what you expected
| What you see | Why | What to do |
|---|---|---|
| The form is still locked after the run | The file may hold no real form fields, or it is built in a way this tool does not change | Upload the copy to Fill PDF Form and see which boxes are still disabled. |
| There are no fields to click | A scanned or flattened form has no fields | This tool cannot create them. Use Fill PDF Form on a form that still has fields. |
| The file asks for a password | The page has no field for one | Remove it with Unlock PDF, then unlock the forms. |
What do the free and paid plans add?
Free
- All converters
- Daily credit refresh
- Email support
Basic
- Access to all features
- AI Extract
- Priority conversions
- Email support
Highest priority
Premium
- Everything in Basic
- Highest priority queue
- Larger file limits
- Priority support
Pay-As-You-Go
- No subscription
- Credits never expire
- Opt-in auto-refill
- Access to all features
What else can you do with a PDF?
Who unlocks PDF forms?
People returning a form that refuses input
An office sent a PDF form whose boxes cannot be clicked, and you have been asked to complete it. Unlock the fields, then fill them in.
Form owners updating a template
You locked the fields of a template before publishing it and no longer have the editable source. Unlock the published copy so you can revise it.
Administrators correcting a record
A submitted form was saved with its fields locked, and one entry is wrong. Unlock a copy, correct the value and keep the original on file.
When to unlock a form, and when to pick another tool
- A form opens normally, but none of its boxes accept typing.
- Fill PDF Form shows the fields you need as disabled boxes.
- A template you own was saved with locked fields, and its default values need changing.
- A pre-filled form from a colleague has one wrong value that has to be corrected.
- The PDF asks for a password before it opens. That is a different lock, so start with Unlock PDF.
Where can I read more?
Sources
- UnlockPDFFormsController source, v2.14.2Stirling-PDF on GitHub
- Stirling-PDF documentationStirling-PDF
Facts checked on October 16, 2026
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Unlock Forms FAQs
What does Unlock Forms do to my PDF?
It runs one operation that makes the form fields in the file editable again and gives you the result as a new PDF. It has no settings and does not fill in any field.
Is Unlock Forms the same as Unlock PDF?
No. Unlock PDF removes a password you already know. Unlock Forms deals with form fields that are marked read-only in a file you can already open.
Why are the fields in my PDF form locked?
A PDF can flag a form field as read-only, and a reader then refuses input for it. Fill PDF Form shows such a field as a disabled box.
Can I choose which fields to unlock?
No. The page has no field list and no options, so the unlock operation covers the whole document.
What if the form is still locked after I run the tool?
The restriction may come from somewhere else. Check whether the file needs a password or limits form filling through its permissions, which Unlock PDF and Change Permissions handle. A flattened or scanned form has no fields to unlock.
Do I need an account to unlock a PDF form?
No. Unlock Forms has the free badge, and one form runs without signing in.
What happens to the form I upload to Unlock Forms?
The file reaches indox over HTTPS. Free-tier uploads and the unlocked copies made from them are deleted automatically within 24 hours after the job finishes.
What should I do after unlocking the fields?
Fill the form in your PDF reader or upload the copy to Fill PDF Form. When the answers are final, Flatten PDF fixes them in place.