Flatten a PDF Form

Lock a completed PDF form so its fields can no longer be edited.

无需登录文件保持私密

将文件拖放到此处或点击浏览

PDF 无文件大小限制

浏览文件

你的文件永远不会离开你的设备。所有处理都在你的浏览器中本地进行。

Fill in a PDF form, then optionally flatten it so the fields can't be edited again. Everything happens in your browser — the PDF is never uploaded.

flattening tips

🔒

Already filled a form elsewhere? Open it here, keep the values, and flatten to lock them in.

🖨️

Flattened forms print and display consistently across every PDF viewer.

🚫

After flattening, the form fields become part of the page — no more accidental edits.

🔒

Runs entirely in your browser.

选择文件

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

处理

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

下载

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓完全免费——永远没有隐藏费用

✓无需账号、邮箱或登录

✓文件永远不会离开你的设备

✓绝无文件大小限制

✓所有输出均无水印

Fill a Tax Form

Complete an official tax PDF and lock it before su

Complete an Application Form

Fill in a job, rental, or school application PDF.

Fill and Lock a Contract

Complete a contract's fields and flatten it before

Fill a Form You Use Often

Quickly complete a recurring PDF form without Acro