Hallo PDF Help › How to fill out a PDF form
How to fill out a PDF form (free)
Fill interactive PDF forms straight on the page — and add fields to forms that don't have any. All in your browser; the form is never uploaded.
1. Open the form
Open the PDF in the editor. If it contains fillable (AcroForm) fields, a 📝 form badge appears in the top bar.
2. Fill the fields on the page
With the Select tool active, the form's fields become live controls right on the page: type into text fields (including multi-line ones), tick checkboxes, pick radio buttons, and choose from dropdown lists. The page re-renders each value as you go, exactly as it will save.
3. No fields? Add your own
If the form is flat (just a printed layout), you have two options:
- Just type on it — use the Text tool to place text anywhere (see How to edit a PDF).
- Create real form fields — open the tool rail's extra tools and pick Text field or Checkbox field under "Form fields". Drag a box where the field should go, give it a name, and it becomes a genuine fillable field anyone can use.
4. Flatten the form (optional)
Use Flatten form fields in the sidebar to bake the entered values into the page content and remove the interactivity — handy before sharing, so the answers can't be edited or accidentally cleared.
5. Save — or export the data
Click Save to download the filled PDF. You can also export just the form data with Form CSV or Form JSON — one row per field with its name, type, and value, useful for collecting responses.
More guides: Sign a PDF · Edit a PDF · Redact a PDF