Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

Do I need to install any software to use NanoTools?

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

What file formats are supported?

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

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File Hash Calculator - Calculate File Hashes

Calculate file hashes online for free. Get MD5, SHA-1, SHA-256 checksums. Verify file integrity.

Upload File

Click to upload a file

Any file type supported

About File Hashing

What is a hash?

A cryptographic hash is a fixed-size string generated from a file. It acts as a unique "fingerprint" for the file. Even a tiny change in the file will produce a completely different hash.

Common Use Cases

Verify file integrity after downloads
Detect file tampering or corruption
Compare files without opening them
Security and forensics analysis

Hash Algorithms

SHA-256: Most commonly used, good balance of speed and security
SHA-512: More secure but slower, produces longer hash
SHA-1: Older, less secure, but still widely used for compatibility

Privacy Note: All hash calculations are performed locally in your browser. Your files never leave your device.

What This Tool Does

Calculates file checksums: MD5, SHA-1, SHA-256, SHA-512
Processes files entirely in browser for security
Compares calculated hash with expected value
Works with any file type and size
Provides instant hash verification

How to Use

1
Select hash algorithm
Choose MD5, SHA-1, SHA-256, or SHA-512
2
Upload file
Select the file you want to calculate hash for
3
View calculated hash
See the file's checksum hash value
4
Verify (optional)
Compare with expected hash to verify file integrity

How it works

Select hash algorithm

Choose MD5, SHA-1, SHA-256, or SHA-512

Upload file

Select the file you want to calculate hash for

Verify (optional)

Compare with expected hash to verify file integrity

Use Cases

Verifying downloaded software hasn't been tampered with
Checking file integrity after transfer
Comparing file versions to detect changes
Validating backup file integrity
Security auditing of critical files

Frequently Asked Questions

What is a file hash?

A unique fingerprint of file contents. Even tiny changes produce completely different hashes.

Which hash algorithm should I use?

SHA-256 is recommended for security. MD5 for quick checks but not security-critical uses.

Why do hashes differ for same file?

If hashes differ, files are not identical - even a 1-bit change produces different hashes.

Are files uploaded to server?

No, all hashing happens in your browser. Files never leave your device.

Back to Tools

File Hash Calculator - Calculate File Hashes

Calculate file hashes online for free. Get MD5, SHA-1, SHA-256 checksums. Verify file integrity.

Upload File

Click to upload a file

Any file type supported

About File Hashing

What is a hash?

A cryptographic hash is a fixed-size string generated from a file. It acts as a unique "fingerprint" for the file. Even a tiny change in the file will produce a completely different hash.

Common Use Cases

Verify file integrity after downloads
Detect file tampering or corruption
Compare files without opening them
Security and forensics analysis

Hash Algorithms

SHA-256: Most commonly used, good balance of speed and security
SHA-512: More secure but slower, produces longer hash
SHA-1: Older, less secure, but still widely used for compatibility

Privacy Note: All hash calculations are performed locally in your browser. Your files never leave your device.

What This Tool Does

Calculates file checksums: MD5, SHA-1, SHA-256, SHA-512
Processes files entirely in browser for security
Compares calculated hash with expected value
Works with any file type and size
Provides instant hash verification

How to Use

1
Select hash algorithm
Choose MD5, SHA-1, SHA-256, or SHA-512
2
Upload file
Select the file you want to calculate hash for
3
View calculated hash
See the file's checksum hash value
4
Verify (optional)
Compare with expected hash to verify file integrity

How it works

Select hash algorithm

Choose MD5, SHA-1, SHA-256, or SHA-512

Upload file

Select the file you want to calculate hash for

Verify (optional)

Compare with expected hash to verify file integrity

Use Cases

Verifying downloaded software hasn't been tampered with
Checking file integrity after transfer
Comparing file versions to detect changes
Validating backup file integrity
Security auditing of critical files

Frequently Asked Questions

What is a file hash?

A unique fingerprint of file contents. Even tiny changes produce completely different hashes.

Which hash algorithm should I use?

SHA-256 is recommended for security. MD5 for quick checks but not security-critical uses.

Why do hashes differ for same file?

If hashes differ, files are not identical - even a 1-bit change produces different hashes.

Are files uploaded to server?

No, all hashing happens in your browser. Files never leave your device.

File Hash Calculator - Calculate File Hashes

Upload File

About File Hashing

What is a hash?

Common Use Cases

Hash Algorithms

What This Tool Does

How to Use

Select hash algorithm

Upload file

View calculated hash

Verify (optional)

How it works

Select hash algorithm

Upload file

Verify (optional)

Use Cases

Frequently Asked Questions

What is a file hash?

Which hash algorithm should I use?

Why do hashes differ for same file?

Are files uploaded to server?

File Hash Calculator - Calculate File Hashes

Upload File

About File Hashing

What is a hash?

Common Use Cases

Hash Algorithms

What This Tool Does

How to Use

Select hash algorithm

Upload file

View calculated hash

Verify (optional)

How it works

Select hash algorithm

Upload file

Verify (optional)

Use Cases

Frequently Asked Questions

What is a file hash?

Which hash algorithm should I use?

Why do hashes differ for same file?

Are files uploaded to server?