Fill PDF Forms Online — Free PDF Form Filler

Upload the PDF and the tool detects every form field — text, checkboxes, radio buttons, dropdowns and signature fields — so you can type, click and sign directly in the browser. The completed PDF downloads as a real fillable PDF that any reviewer can open in Acrobat or Preview.

Yes. Switch to free-form mode and click anywhere to add text, drop checkmark and X stamps onto checkboxes, and overlay a signature image. This works for scanned tax forms, government applications and printable contracts that were never made interactive.

Yes. Type a stylised signature, draw one with your mouse or finger, or upload a transparent PNG of your scanned signature. Place initials in the margins, then flatten the document on download so the signature cannot be removed by recipients.

Yes. The page background, fonts, layout and security settings stay intact. The tool only adds your filled values on top of the existing structure, so HR forms, tax filings and contracts arrive looking exactly like the original.

Your PDF is uploaded over HTTPS to our secure server to detect and fill its form fields, then removed under our Security policy — we do not sell the file or share it with third parties. Filling online this way saves printing and re-scanning; for documents under a strict no-upload data-residency rule, a fully offline desktop tool is the safer choice.

Yes. Toggle "Flatten on download" and every filled field is baked into the page, preventing recipients from accidentally changing the values. Use it for final-version contracts and tax submissions where the form must be locked.

After the form fields are detected, an Output filename field appears in the Output panel pre-filled as "yourfile-filled.pdf". Edit it to whatever name you need — useful for keeping a consistent naming convention like "lastname-application-filled.pdf" when submitting forms to HR, schools or government portals.

Fill in every detected field first (text boxes, checkboxes, dropdowns and radio groups all appear automatically), set a clear Output filename so the recipient can identify it, and turn on Flatten only once you're done editing — flattening locks the values into the page so they can't be accidentally changed after you send it. Skip flattening if you expect to reopen and adjust the same PDF later.

The tool reads each field's actual AcroForm type from the PDF: dropdown and list fields render as a select box populated with the exact options the form author defined, and radio groups render as individual radio buttons for each option. This keeps your answers restricted to values the form actually accepts, so you can't accidentally type something the form wasn't built to hold.

PDF forms occasionally contain field kinds this tool can't render an editable control for in the browser — most often digital signature fields, button/JavaScript fields, or barcode fields. Those show 'Unsupported field type' in the Fields panel and are left untouched in the output, while every text box, checkbox, dropdown, list and radio group next to it still fills and downloads normally. For those specific fields, open the filled PDF in Acrobat or Preview to complete them, or use Flatten to lock everything else first.

Yes. Flatten locks in whatever values are currently in each field — including blanks — so any field you didn't type into is baked in as empty. If a field must be answered before you flatten, fill it first; once flattened there is no way to edit that value again in this tool, so leave Flatten off if you plan to finish the rest of the form in Acrobat afterward.

Yes — Pixoate supports batch and bulk processing. Switch to Batch mode, paste up to 60 CSV data rows on Premium or 200 on Pro, set your options once, and every CSV data row is processed with the same settings before you download one ZIP containing a filled copy of the PDF template per row. Bulk processing is a Premium feature; the output uses the same quality and settings as single mode.

Yes — with bulk processing you configure the settings a single time and they apply to every item in the batch — up to 60 CSV data rows on Premium or 200 on Pro. There is no need to repeat the setup per item, and Temporary uploaded and generated files are processed securely and deleted automatically.

Almost always one of three things. The file is over the 11 MB free upload limit — Premium takes 50 MB and Pro 120 MB. The format is not one this tool accepts, so check the list shown on the upload panel. Or the file is not really the format its name says: renaming a file does not change what is inside it, and that is the reason a valid-looking PDF gets refused.

Page content is preserved, but anything that depended on the original file being interactive can behave differently — form fields, layers and annotations may be flattened into the page depending on the operation you ran. If you need the fields to stay fillable, do the flattening step last. Keep the untouched original until you have checked the output end to end.

No. You can run Fill PDF Forms and download the free result without an account, and it carries no watermark. Premium is what you buy when the limits start to bite: up to 60 files in one batch, larger uploads, no daily cap, and the original-resolution result. Nothing is revealed at the download step that was not visible before you started.

No — Fill PDF Forms runs in the browser on desktop and phone. There is nothing to install, no trial to start, and no license to buy before you can see whether it does what you need. Try it on the file you are actually stuck with rather than a sample.