Osign

Osign is a professional tool for locally signing and installing IPA files on iPhone and iPad. It does not rely on cloud services, nor does it provide third-party app libraries. All signing operations are completed independently on your device. You only need to import IPA, p12, and provisioning profile files, and Osign can instantly generate an installable version, making test builds and internal distribution simple, secure, and controllable.

Simple
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Efficient
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Local
Osign

Installation Guide

Choose the installation method that suits you best

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Method 1: DNS Configuration

Install via DNS configuration file

This installation method prohibits the use of VPN
1

Download DNS Configuration

2

Install DNS Configuration

After downloading, go to Settings > General > VPN & Device Management, tap the downloaded DNS configuration file and install it.

3

Sign

Please visit sign.ipasign.cc and select the required files. After processing and signing is complete, click the provided link or scan the QR code to install directly.

4

Trust Enterprise Developer

On first launch, go to Settings > General > VPN & Device Management, find the enterprise app and tap "Trust".

5

YouTube Video Tutorial

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Method 2: Direct Install

The fastest and simplest way

Valid certificate required
1

Sign

Please visit sign.ipasign.cc and select the required files. After processing and signing is complete, click the provided link or scan the QR code to install directly.

2

Trust Enterprise Developer

After installation, go to Settings > General > VPN & Device Management, find the enterprise app and tap "Trust".

Usage Help

Quick guide on how to use Osign

📂

Import Certificate

Go to the "Certificate" section, tap the "+" button in the top right corner. Add certificate and provisioning profile files.

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📥

Import IPA File

Go to the "Library" section, tap the "+" button in the top right corner, and import the IPA file that needs to be signed.

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Select App

Go to the "Library" section, find and select the imported IPA file.

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✅

Sign and Install

Tap the "Sign" button, then "Start Signing". Wait a few seconds, and it can be installed.

FAQ

Answers to questions you may have

Q

Why does it show "Unable to install" or "Unable to verify app"?

Unsupported signature type (such as expired certificate); VPN is enabled on the device, need to delete app, turn off VPN, replace signing certificate, re-sign, and install.

Q

Are my certificates and files safe?

Yes, Osign takes data security very seriously. All files are stored on local devices and will not be uploaded to any server. Your certificates, provisioning profiles, and IPA files are completely under your control.

Q

How to get p12 certificate and provisioning profile?

You can get the certificate from the certificate download button on this site to install osign.

Q

Can I batch sign multiple IPA files?

Yes, Osign supports batch signing. You can import multiple IPA files at once and use the same certificate and provisioning profile for batch signing, greatly improving work efficiency.

Q

What should I do when encountering "Untrusted Enterprise Developer" when installing IPA files?

This is a normal security prompt. Please go to "Settings" → "General" → "VPN & Device Management", find the corresponding enterprise developer certificate, tap it and select "Trust" to use the app normally.

Q

Is Osign free?

Osign provides a free version with basic signing features. We also offer a premium version with more advanced features and batch processing capabilities. You can choose the version that suits your needs.