A PDF app that works offline
Open the PDF you were sent, add your hanko, sign it and send it back. Paper documents can be scanned into PDFs too. Everything happens on your device, and nothing is sent anywhere.
All features
The everyday tools are free. Pro is for working in bulk and protecting documents.
4 toolsFreePro
Write straight into the blanks.
Write freely with your finger or Apple Pencil.
Mark up text to find it again later.
Circle, point at, or paste a logo or photo.
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Add, rotate, duplicate, delete and reorder.
Several PDFs into one.
One page per file, or by range like 1-3,5.
3 toolsFreePro
Photos into a PDF, PDF pages into pictures.
High, standard or smallest, with the size before and after.
Compress, watermark or encrypt many files at once.
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Strip the author name and other hidden details before you send.
A password to open, plus print, copy and edit permissions. Encryption can be removed too.
Put 'Confidential' or any text on every page.
Documents, stamps and signatures are stored encrypted, tied to your screen lock.
Ask for authentication when the app opens.
3 toolsFreePro
Free: up to 3 pages per scan, Color and B&W filters.
Free: 3 times a month.
Finding fields and filling them by hand is free. Filling from your profile, placing signature and stamp, and OCR detection are Pro.
1 toolsFreePro
Send PDFs directly to PDF Hanko on another phone on the same Wi-Fi. Sending is Pro; receiving is free.
Saving, sharing and printing are free (only sending to a nearby device needs Pro).
Send to Nearby Device
Send PDFs straight from one phone to another on the same Wi-Fi — iPhone to Android works too. No server, no internet, no account.
Files go directly from device to device. Nothing is uploaded to a server.
iPhone to iPhone, Android to Android, or between the two. The other person just opens PDF Hanko on the same Wi-Fi.
The connection is encrypted end to end (P-256 ECDH and AES-256-GCM). Both screens show the same 6-digit code, so you can compare before you send.
A file arrives only after the other person opens Receive from Nearby and taps Receive — nothing is received automatically. Every file is checked with SHA-256 when it lands.
Sending needs PDF Hanko Pro. Anyone can receive, on the free version too.
At the office
In a Japanese office a proposal — a 稟議書 — collects a seal from each manager up the line. With PDF Hanko the manager stamps it, sends the PDF by email or chat, and the president stamps it on their own phone. Nobody walks a sheet of paper from desk to desk.
Open the 稟議書 PDF you received and put your seal in the 部長 box.
Save it and send it to the president by email or chat.
They open it on their own phone and stamp the 社長 box.
An approval date stamp, send it back, done. Nothing printed.
How it works
No printing, no scanning it back in.
From Mail or the Files app, or straight from another app's Share menu.
Tap Stamp, pick a seal, and drag it into place at the size you want.
Write your signature once with your finger or Apple Pencil. After that it's one tap.
Lock your edits into the PDF and send it by mail, to Files, to a printer or any other app.
Your edits are saved as a draft as you go. The original PDF isn't changed until you save.
Digital hanko
Choose the typeface, the rim, the ink — vermilion, red, black or navy — and anything from a crisp print to the worn look of a real stamp. Make it once, use it on every document.
In the free version you can make one stamp of your own. The sample stamps that come with the app are always free.
Scan and OCR
The camera finds the corners of the page, straightens it and cleans it up so it's easy to read. You can stamp the scanned PDF right away.
Form autofill
The app finds fields like Name, Address and 印 in the PDF and fills them from your profile — and puts your signature and stamp where they belong.
Encryption and security
Give the quote or contract you're about to email a password and permissions. Encryption happens on your device too, so neither the document nor the password goes anywhere.
Offline first
The internet is only used to buy or restore Pro, and the App Store or Google Play handles that.
Why you can trust it
Editing, stamping, scanning and OCR all work with no connection.
A document leaves the app only when you share, export or send it to a nearby device yourself.
Protect it with Face ID, Touch ID or your passcode. Contents are hidden in the app switcher too.
Documents on the device are encrypted with your screen lock. PDFs you send can be locked with an AES-256 password.
Files made for sharing or exporting are deleted when you leave the app.
On a tablet, edit in a side panel while the document stays in view.
Switch in Settings. No restart needed.
Pricing
Viewing, filling in, stamping, signing and saving are free. PDF Hanko Pro unlocks everything, with no limits. Try every Pro feature free for 7 days — you are never charged automatically.
¥480/ month
Cancel any time
¥3,980/ year
About ¥332 a month
¥6,980
Pay once, use it forever
| Feature | Free | Pro |
|---|---|---|
| View PDFs | Included | Included |
| Place stamps & signatures | Included | Included |
| Text, dates, pen, symbols | Included | Included |
| Highlights, shapes, arrows, images | Not included | Included |
| Create stamps (text) | Up to 1 | Included |
| Create signatures (hand-drawn) | Up to 1 | Included |
| Stamps & signatures from photo/image | Not included | Included |
| Scan documents | 3 pages/scan | Included |
| Scan filters & brightness | Partial | Included |
| Japanese OCR (text recognition) | 3 per month | Included |
| Form autofill | Partial | Included |
| Pages, image ⇄ PDF | Included | Included |
| Merge, split, compress PDFs | Not included | Included |
| PDF encryption (AES-256), watermark | Not included | Included |
| Batch processing (multiple files) | Not included | Included |
| Send to Nearby Device | Receive only | Included |
The monthly and yearly plans are auto-renewing subscriptions. They renew unless cancelled at least 24 hours before the period ends. Cancel or change your plan any time in your App Store or Google Play subscription settings. Apple or Google handles the payment; PDF Hanko never receives your payment details.
Prices are Japanese App Store prices including tax. They differ by country; the app shows the price for your store before you buy. The free version shows a small in-app Pro banner (hidden in Pro). The app contains no ad SDK.
FAQ
Yes. Editing, stamping, signing, scanning and OCR all run on your device. The only time it goes online is to buy or restore Pro.
No. PDF Hanko has no server and no accounts. A document leaves the app only when you share, export or print it, or send it to a nearby device.
Yes, with Pro. PDF Tools → Encrypt PDF sets an AES-256 password to open it, plus print, copy and edit permissions. You can also set it from the save and share screen, or encrypt many files at once.
Yes. With Send to Nearby Device, two phones running PDF Hanko on the same Wi-Fi — iPhone or Android, in any combination — send PDFs directly. Files never pass through a server, and the connection is encrypted between the two devices. Check that the 6-digit code is the same on both screens before you send. Sending is Pro; receiving is free.
PDF Hanko places an image of a seal, not a qualified electronic signature. Check with whoever you're sending to whether a stamped PDF is enough.
Yes, with Pro. Press it on white paper and photograph it, or import an image; the background is removed and you get a transparent seal.
Viewing; text, date, check and pen; one stamp and one signature; scans of up to 3 pages; OCR 3 times a month; finding form fields and filling them by hand; the page manager; image/PDF conversion; saving, sharing and printing; receiving from nearby devices. For the first 7 days you can try every Pro feature free.
Your data stays on the old device — nothing is synced. Export your PDFs and move them over. Pro comes back with Restore Purchases on the same Apple ID or Google account.
On iPhone: Settings → your name → Subscriptions. On Android: Google Play → Payments & subscriptions. Deleting the app does not cancel it.
iPhone and iPad on iOS 15 or later, and Android phones and tablets on Android 7.1 or later.
Download
No account, no sign-up. Install it and start.
