# File Signature: Sign any file — Verify Document Integrity

> Verify Document Integrity (iPhone/iPad app by Irvinesoft Inc.)

- Source: https://appshunter.io/ios/app/file-signature/id6739385082 (this page in markdown: same URL + `.md`)
- Developer: [Irvinesoft Inc](https://appshunter.io/developer/1654264185)
- Category: Business, Utilities
- Price: $9.99
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2024-12-14
- Data updated: 2026-05-14
- User reviews in markdown: https://appshunter.io/ios/app/file-signature/id6739385082/reviews.md

## What is File Signature?

File Signature is a privacy-focused app that lets you generate and verify MD5 signature for your files directly on your device—no files are ever uploaded to cloud servers. This ensures maximum privacy and security for sensitive documents. It also creates a confirmation PDF file that combines all MD5 signatures, allowing each party to sign offline as needed. This streamlined process guarantees file integrity while keeping your data under your control.

Unlike popular tools such as DocuSign, Adobe Sign, PandaDoc, and HelloSign, which require uploading documents to their platforms for electronic signing, File Signature processes everything locally. It eliminates the risk of data breaches and privacy issues tied to cloud storage. Additionally, File Signature focuses on document verification and offline confirmation, making it an ideal alternative for users who value simplicity, security, and flexibility.

Available for iPhone, iPad, and Mac, DocSignature ensures seamless functionality across all your Apple devices.

Key Features:  
- Local MD5 Signature Generation and Verification: Upload multiple files, generate their MD5 signatures, and confirm their integrity locally on your device.  
- Confirmation Document Creation: Combine file signatures into a professional PDF document for streamlined use as an amendment or reference to existing contracts and agreements.  
- Privacy and Security: All file processing is performed locally on your device—no data is transmitted to external servers, ensuring maximum confidentiality.  
- Universal Compatibility: The MD5 signatures generated can be verified with any trusted third-party software, making it easy to confirm authenticity across platforms.  
- Simplified Workflow: Skip the complexities of multi-party signing processes and focus on ensuring document integrity with ease.  

Why Choose File Signature?  
File Signature is an ideal choice for professionals and individuals who prioritize data privacy and simplicity. Whether you're verifying sensitive documents for business use or ensuring personal files remain unaltered, File Signature provides a lightweight and effective alternative to traditional electronic contract tools.  

Developed and distributed by Irvinesoft Inc., a trusted US-based software company, File Signature is a reliable tool for all your digital document verification needs.  

Download File Signature today and take control of your document security with cutting-edge simplicity!

Terms of use: https://account.ivsapi.com/#/termsofuse
Privacy policy: https://account.ivsapi.com/#/privacy


## Version history (last 2 releases)

### 1.1 — 2024-12-20

Minor fixes.

### 1.0 — 2024-12-15

No release notes.

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All apps by Irvinesoft Inc: https://appshunter.io/developer/1654264185

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-14.*