PDF Toolkit

chữ ký viết tay

Draw signature on canvas and export as PNG — transparent.

Use Cases

Typical scenarios for chữ ký viết tay — see if it fits before you start

chữ ký viết tay · Scenario 1

For remote contracts, drop drawn/image signature; chữ ký viết tay supports drag/scale/rotate with timestamp.

chữ ký viết tay · Scenario 2

Filling forms, chữ ký viết tay auto-detects fields — fill+sign in one step, no print-scan.

chữ ký viết tay · Scenario 3

Before delivery, chữ ký viết tay offers hi-res preview with undo/redo.

How to Use

  1. Upload — Click or drag PDF/images to the dashed zone. Multi-file and large files (<100MB per batch recommended) are read locally only.
  2. Configure & process — Set pages, angle, password or quality, then hit “Calculate / Process”. chữ ký viết tay runs via WebAssembly and pdf-lib in your browser — no server queue.
  3. Preview & download — Check pages, size and thumbnails on the right, then download. Batch jobs download one by one; tweak and re-run if needed.

Tips & Notes

  • Page syntax: Use 1,3,5-7 or 1-10,15; empty means all. Out-of-range pages are ignored.
  • Privacy & size: Everything runs locally — no server upload. For large files, process in batches of 50–100 pages.
  • Fidelity: Fonts and vectors are preserved where possible. For scanned PDFs, run OCR/searchable PDF first, then convert.

Features

  • Sign & fill forms
  • Draw/image signature
  • Preview before delivery

Supported Formats

Input
PDF
Output
PDF

All conversions run locally in the browser; check fidelity in desktop for complex layouts.

FAQ

Will files be uploaded? Is chữ ký viết tay safe?

No. chữ ký viết tay runs 100% in your browser via File API; no network upload, memory cleared when you close the tab.

Processing failed or download blocked?

Check page ranges, passwords and file integrity. If the browser blocks multiple downloads, allow “automatic downloads” or click links one by one.

How to chain with other sign tools?

Combine workflows: organize pages first, then compress/convert for submission, then protect/sign for delivery.

Cách sử dụng

Upload file, process, download.

Add Signature to PDFAdd typed signature to PDF — positioned text. Fill and Sign PDFFill form fields and add signature to PDF — text + signature overlay. Sign PDFChữ ký Draw on PDFFreehand draw on PDF pages — demo circle and text. Add Image to PDFInsert images into PDF pages — position, resize and rotate. Add Link to PDFAdd clickable hyperlink to PDF pages — URL annotation.
📖How to Sign a PDF OnlineSign contracts and forms online — draw or upload your signature, position and date it, file stays local.

All calculations run locally in your browser; nothing is uploaded.