Fill Out a PDF Form Online
Upload your form: its fields become typing boxes right on the page. Type your answers, check the boxes, sign if needed and download the filled PDF, readable in any app. The file never leaves your device.
- Free
- Fillable PDF forms
- Signature included
- 100% private
100% private — Everything is processed directly in your browser: your files, voice, and image are never sent to Chatzam's servers.
How do I fill out a PDF form?
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Upload the form
Drag the PDF into the box above. The tool detects every field to fill in: text boxes, checkboxes, radio buttons and dropdown lists.
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Fill in the fields
Type directly on the document and move from one field to the next with the Tab key. On a phone, the "Field list" view shows each question in large print.
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Download the filled PDF
Add your signature if needed, choose whether to flatten the document, then download it: your answers show up in every PDF reader.
Real form filling
Every field type
Single-line and multi-line text, comb fields with one box per character (Social Security number, ZIP code), checkboxes, radio buttons and dropdowns.
Accents and symbols
Accented letters, symbols like $, € and £, and curly quotes display correctly, even in readers that don't redraw form fields.
Optional flattened PDF
Lock your answers into the page: the document can no longer be edited, ideal for sending by email or uploading to an official website.
Handwritten signature
Draw your signature with your finger or mouse, then place it in the signature box or anywhere you like.
Fill out a government form online without printing it
Most forms you download from official websites (tax forms, passport and visa applications, school or insurance paperwork) are so-called "fillable" PDFs: every box is a real input field. You still need an app that can fill them in and save the result, and the viewers built into browsers and phones don't always do that. Here, the fields are detected automatically and turned into typing boxes placed exactly where they belong on the page. You fill out the form on screen, in the order its author intended, and get a PDF that's ready to email, upload to an online portal or print cleanly, with no handwriting to decipher.
Flattening a PDF: when is it useful?
A filled form normally stays editable: anyone who opens it can change an answer. When you check "Flatten PDF," your answers are permanently merged into the page, as if the document had been printed and scanned, but perfectly sharp. That's useful for submitting a finished application, making sure no field shows up blank in a less compatible reader, or uploading the file to a site that rejects active forms. Keep an unflattened copy, though, if you may need to correct your answers later: a flattened PDF can't be filled in anymore.
Forms with no fields, protected forms and XFA forms
Some PDFs have no fields at all: they're scanned documents or forms designed only for printing. The tool tells you so and points you to "Write on a PDF," which lets you add text and checkmarks anywhere. PDFs protected against editing are unlocked automatically when no password is required to open them; if a password is needed, use "Unlock PDF" first and come back. Finally, XFA forms, an older Adobe technology, only open correctly in Adobe Acrobat Reader.
Frequently Asked Questions
Is my form uploaded to a server?
No. The PDF is read, filled in and saved entirely in your browser. Your answers, often personal (address, Social Security number, income), never leave your device.
Why don't my answers show up in some PDF readers?
Each field has an "appearance" that has to be redrawn after you type. The tool generates it for every filled field, so the text shows up everywhere. If in doubt, check "Flatten PDF": your answers then become part of the page itself.
Can I fill out a PDF form on my phone?
Yes. On a small screen, the "Field list" view shows each question with a large input box. The pin icon shows where the field is on the document, and zoom lets you check the result.
The tool says "no fields to fill in." What should I do?
Your PDF is a print-only document with no input fields. Open it with the "Write on a PDF" tool: you can place text, checkmarks and the date anywhere on the page.
Do the form's automatic calculations work?
No, scripts built into some forms (calculated totals, fields that fill themselves in) aren't run. Enter those values yourself; fields locked by the author stay read-only.