Fill PDF Form Online - Free PDF Form Filler
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PDF files with fillable form fields
Government forms, tax applications, job applications, and contracts are frequently distributed as fillable PDF forms. Filling them properly usually requires Adobe Acrobat. This free tool reads the interactive form fields from your PDF, lets you type directly into each one, and saves the completed form as a downloadable PDF. Works with text fields, checkboxes, and dropdown menus. Runs entirely in your browser - your documents are never uploaded to any server.
How to use this tool
- 1Upload the PDF form. Only PDFs with interactive AcroForm fields are supported (the kind where you can normally click and type in Adobe Reader).
- 2Click 'Read form fields'. The tool extracts all fillable fields from the PDF.
- 3Fill in each field: type in text fields, check or uncheck checkboxes, and choose options from dropdowns.
- 4Review all fields, then click 'Download filled PDF' to save the completed form.
- 5If the tool shows 'No fillable form fields found', the PDF does not contain interactive fields and cannot be filled with this tool. It may be a scanned document or a flat PDF.
Example
A council housing application PDF has 28 text fields (name, address, income, household members), 12 checkboxes (eligibility criteria), and 3 dropdowns (property type preferences). Upload it, fill in all fields in the browser, download the completed form. No printing, scanning, or software installation needed.
A supplier sends a new vendor registration PDF with company details, bank details, and a declaration checkbox. Fill in company name, registered address, VAT number, bank account fields, check the declaration, and download. Email the completed PDF back in minutes.
Common use cases
- Filling government forms, tax returns, and official applications distributed as PDF forms
- Completing job applications or HR onboarding forms sent as PDF files
- Filling in supplier registration, vendor onboarding, or client intake forms
- Completing insurance claim forms, financial declarations, or compliance questionnaires
- Anyone who receives a fillable PDF and does not have Adobe Acrobat installed
Common mistakes
- Uploading a scanned PDF that looks like a form but has no interactive fields - scanned forms are images and do not contain AcroForm fields. This tool will show 'No fillable fields found'. For scanned forms, you need OCR software or to print and fill by hand.
- Uploading a flat PDF where the form fields have been locked or flattened - if a PDF was previously filled and then flattened (a common step to prevent further editing), the fields are no longer interactive. You will see 'No fillable fields' even if the form appears filled.
- Expecting to edit the form design or add new fields - this tool only fills existing form fields. It cannot add new text fields, move form elements, or change the layout of the PDF.
- Not downloading before closing the tab - all your entered data is stored in the browser only. If you close the tab without downloading, the filled form is lost.
Frequently asked questions
What types of PDF forms are supported?
The tool supports PDFs with AcroForm fields - the standard interactive form format used in Adobe Acrobat and most PDF authoring tools. Text fields, checkboxes, and dropdown menus are fully supported. Radio button groups and signature fields are shown as read-only.
Why does the tool say 'No fillable fields found'?
This means the PDF does not contain interactive form fields. Common reasons: the PDF is a scanned document (an image, not a form), the form fields were flattened when the PDF was created, or the document was intentionally made non-editable. You can try the PDF Redactor or Sign PDF tools to add markings on top of a flat PDF instead.
Are my documents uploaded to a server?
No. All processing happens in your browser using pdf-lib. Your PDF files are never uploaded to any server, stored, or transmitted. Everything runs locally.
Can I fill in password-protected PDF forms?
No. The tool cannot process password-protected or encrypted PDFs. Remove the password using a PDF application before uploading.
Will the filled form look exactly like the original?
Yes. The form structure, layout, fonts, and images are unchanged. Only the form field values are updated. The downloaded PDF is a standard PDF that opens correctly in any PDF viewer.
Can I save my progress and come back later?
The tool does not save state between sessions. If you need to pause, download the filled PDF, then re-upload it later to continue. The partially filled form will be readable when re-uploaded.
What if a field I need to fill is showing as read-only?
Some PDF forms lock certain fields (e.g. pre-filled reference numbers, auto-calculated totals). These are shown as read-only and cannot be changed. If you believe a field should be editable but is showing as read-only, the field was locked by the PDF author.
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