How to fill out a PDF form — both editable and scanned

You can tell a lot about an organisation by the PDF forms they ship. The ones with proper fillable fields — click in, tab through, dropdowns and checkboxes — come from places that respect your time. The ones that arrive as flat images of a paper form, sometimes scanned slightly crooked, come from somewhere a fax machine still works.

Both kinds need filling. This guide covers both, plus the small details that make a filled-in form look professional rather than handmade.

Two kinds of PDF forms

The PDF format supports interactive form fields — text boxes, checkboxes, dropdowns, radio buttons. When the person who made the form used a tool that adds these properly (Adobe Acrobat Pro, LibreOffice, modern web-form-to-PDF generators), the result is what's called an AcroForm. You click on a field, you type, and the text lands exactly where it should.

The other kind is a flat PDF: the form looks like a form to your eye, but to the PDF the lines and labels are just drawn on the page like any other content. There are no fields. Common reasons:

• The form was scanned from paper.
• The form was made by exporting a Word doc with no interactive fields configured.
• The form was made interactive but then "flattened" later to lock it.

You handle each kind differently. The good news: the same tool can do both.

How to tell which kind you have

The fastest test is just to try clicking on a field after opening the PDF in any reader. If a text cursor appears and the field highlights subtly, it's an AcroForm. If your click does nothing, it's flat.

You can also look at the file in esignmypdf: AcroForm fields render as light boxes overlaying the page. Flat PDFs just look like a static image of the form, with no visible field outlines.

A third clue is file size and content. Forms with real fields tend to be smaller and have selectable text when you try to highlight with your cursor. Scanned forms are often larger (because they're essentially images) and the "text" can't be selected — drag-selection does nothing.

Filling an editable PDF (AcroForm)

The good case. The form already knows where the fields are.

1. Open the PDF

Go to esignmypdf.com/sign and open the file with the 📂 Open PDF button. The form appears with its fields rendered.

2. Click into the first field

Click on the field you want to fill. A cursor appears; the field accepts your typing. Use Tab to move to the next field, Shift-Tab to go back. Most well-built forms have logical tab order.

3. Work through the form

Fill each field in turn. Text fields accept plain text. Checkboxes toggle when you click them. Dropdowns open with a click. Radio buttons select one option from a group.

4. Sign the signature lines

Some AcroForms have signature fields (rendered as a slightly different field type). Some don't, and just have a labelled line where a signature goes. For both: click ✒ Signatures, draw or type your name, and drag it onto the signature line. Resize so it fits between the lines neatly.

5. Download

Click ⬇ Download PDF. The filled form is saved to your device, with all your entries baked in.

Filling a flat or scanned PDF

When the PDF has no real fields, you'll need to draw your typed text directly onto the page, aligning it with the printed lines. The tool's T Text feature is built for this.

1. Open the PDF

Same step — open the file in the signer.

2. Switch on the Text tool

Click T Text in the toolbar. The button stays active until you click it again or place text.

3. Click where the text should go

Click on the page, roughly where the form line is. A text field appears at that spot, ready to type into.

4. Pick a sensible font size

The default size is usually a decent starting point, but you can adjust. As a rough rule, your text should be about 70% of the height of the form line — leaving a small gap above and below.

5. Type your entry, then click outside

Type, then click somewhere else on the page. The text commits. You can click the text again later to edit or reposition it.

6. Repeat for each field

Work through every line of the form, placing text where it belongs. Zoom in if precise placement is tricky.

7. Sign at the end

Use the Signatures tool the same way as on an AcroForm. Drag the signature onto the signature line.

Getting clean alignment

The difference between a filled form that looks professional and one that looks slapdash is mostly about alignment. Five tips:

• Zoom in before placing. Use the + button or pinch-zoom to enlarge the area you're filling. Placement is much easier when the form line takes up half your screen rather than a quarter inch.
• Watch for descenders. Letters with descenders (g, p, q, y) extend below the baseline. If your text sits exactly on the form line, those descenders will cross it. Position so the baseline of your text is a hair above the form line.
• Match the form's typography roughly. If the form uses a serif font, your typed entries don't have to use serif, but matching feels more polished. The Text tool lets you pick the font.
• Don't go larger than the line allows. Cramped text is fine; text that overflows the line above looks careless.
• Be consistent. Use the same font size for similar field types throughout the form. If your name in line 1 is 12pt, the address in line 2 should be 12pt too.

Checkboxes, dates, and dropdowns

Some field types need a slightly different treatment on flat PDFs.

Checkboxes

On a flat PDF, type an X or the character ✓ into the checkbox. Use a slightly bolder font weight if available. Position so the mark is roughly centred in the box.

Dates

Use the format the form seems to expect. If it shows MM/DD/YYYY, type 05/11/2026. If it shows Day Month Year, type 11 May 2026. Consistency with the form's other labels is more important than any single "correct" format.

Multi-character fields with one box per character

Some forms have a row of boxes, one for each digit or letter (Social Security numbers, postcodes, dates). For these on a flat PDF, you may need to place each character as a separate text annotation. Get one right, copy by re-clicking, and adjust position. Tedious but unavoidable.

Yes/No or multiple-choice circles

Type a single character — often an X or a filled dot like • — and position it inside the right circle.

Saving and submitting

When the form is filled and signed, click Download PDF. You'll get a new file with your entries baked in. Two things to know:

For AcroForms, the fields stay editable by default. The PDF you download retains the form structure, so a recipient could change your entries if they tried. For most uses this is fine — your entries are visible and verifiable. If you need to lock them, you can "flatten" the PDF using a separate tool, or print to PDF using your operating system's printer dialog.

For flat PDFs, your typed text is baked in as annotations. Standard PDF readers can sometimes remove annotations, so the resulting file is similar to a printed-and-scanned version — the entries are firmly there but not impossible to alter. For most form submissions this is acceptable, and is the same robustness as a scanned-in handwritten form.

How to submit. Look at the form's instructions. Many ask for:

• An email attachment to a specific address.
• Upload through a portal (which may handle PDFs natively).
• Postal mail (in which case print the filled-in PDF and post it).
• Fax (which still happens for some government and medical forms).

If the form is for tax or government use, save a copy in your records before submitting. The tool doesn't keep one for you — by design.

Common questions

Can I save my partially-filled form to come back later?

Your in-progress entries are kept in your browser's local storage automatically, so closing the tab and reopening the same PDF will restore them. They don't sync to other devices.

The form has a digital signature requirement. Can the tool produce one?

esignmypdf produces electronic signatures (a drawn or typed signature image embedded in the PDF), not cryptographic digital signatures using PKI. For forms that specifically require a "digital signature" — some government filings, certain legal documents — you may need a tool that integrates with a certificate authority. See our guide on the difference.

What about IRS forms specifically?

The IRS accepts electronic signatures on most of its forms. We have a dedicated walkthrough for signing a W-9 form, the most common one.

The form has a "Submit" button — does it work?

Some AcroForms include a Submit button programmed to post to a URL. Browser-based signers (including this one) generally don't trigger those scripts for security reasons. After filling, download the form and submit through the means the form's organisation provides.

How accurate does my text need to align with the form lines?

Close enough that the form is readable. Government and corporate processors generally accept some misalignment in returned forms — they're used to printed-then-scanned versions, which often drift. Don't agonise over single-pixel alignment.

If a specific form type gives you trouble, we'd love to hear about it — practical edge cases help us improve the tool's defaults. Reach us through the contact page.