Mobile signing toolkit

Free tools for iOS signing requests, iPhone UDID capture, and Android release keystores

These tools are designed for teams shipping Capacitor, Ionic, React Native, Flutter, and native mobile apps. Generate the files you need, validate device data quickly, and keep your release process moving without bouncing between desktop utilities.

Open iOS certificate generator See the native build workflow

Tool stack

Choose the tool that matches your release bottleneck

Each page includes the utility, setup guidance, FAQ markup, and internal links to the broader signing and build docs.

CSR + private key

iOS Certificate Generator

Generate an Apple-ready certificate signing request and private key for manual signing, CI, and cloud builds.

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Profile service

iOS UDID Finder

Install a lightweight profile on an iPhone or iPad and surface the UDID, model, serial, and iOS version in seconds.

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PKCS#12 keystore

Android Keystore Generator

Create a PKCS#12 signing keystore, alias, and certificate summary for Play Store or direct Android releases.

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Real outputs

The tools generate downloadable signing files and device data instead of stopping at a demo interface.

Release-focused

Each flow is written for app signing, ad-hoc testing, CI handoff, and cloud build pipelines.

Search intent coverage

The pages answer setup questions, troubleshooting questions, and operational questions around mobile signing.

Release operations

Why these pages exist

Mobile teams still lose time on the same tasks every week: generating a fresh CSR for Apple Developer, collecting a tester UDID from a physical iPhone, or creating a keystore that matches the Play signing pipeline. Search results often send people into outdated CLI examples or forum threads with half the steps missing.

These pages are meant to be operational. The interface produces the output immediately, while the surrounding content answers the follow-up questions that usually appear right after generation: where the file goes next, which values must be stored securely, and how the asset fits into CI or cloud build systems.

If you are running a cross-platform release process, pair these tools with the Capgo native build docs and keep the generated signing assets in a secure secret manager instead of committing them to Git.