FileVerifier

Sun.Rain

About this app

FileVerifier is an offline file integrity tool that answers one question: is this file the same as it should be?

File transfers through cloud drives, messengers, or local networks can silently corrupt a file. An APK that installs on one phone may fail on another — and you can't tell why. FileVerifier lets you check in seconds.

Key Features

• 7 hash algorithms: MD5, SHA-1, SHA-256, SHA-384, SHA-512, CRC32, and Adler-32
• Verify against an expected hash: paste a checksum and instantly see whether the file matches
• Byte-by-byte binary comparison: open two files and see exactly how many bytes differ and where the differences are located
• File size displayed down to the exact byte
• Streaming computation handles large files (GB+) smoothly, with a live progress bar
• Copy any hash to the clipboard with one tap

Common Use Cases

• Confirm an APK downloaded from a cloud drive is intact before installing
• Compare a transferred file with the original to check for damage
• Verify downloaded software against the checksum published by the developer
• Find out whether two copies of a file differ, and how

Privacy First

FileVerifier requests no permissions and no internet access. Files are selected by you through the system file picker and processed only in memory on your device. Nothing is collected, uploaded, or stored.

Supports English, 中文, 日本語, and 한국어, with a clean Material Design interface and dark mode.

What’s new

Android file integrity checker: hash, byte compare & APK verify.