MW SysArcTools

Fast · private · browser-only

Inspect, encode and verify without uploading.

Hash text and files, verify integrity, transform encodings and explore classical ciphers entirely in your browser.

Browse tools

Focused utilities

Computing & Cryptography Tools

Browser-only

SHA-256 generator

Generate a SHA-256 digest from text locally.

Open tool Browser-only

SHA-512 generator

Generate a SHA-512 digest from text locally.

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SHA-384 generator

Generate a SHA-384 digest from text locally.

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SHA-1 generator

Generate a legacy SHA-1 digest for compatibility checks.

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MD5 generator

Generate an MD5 checksum for legacy compatibility.

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File hash

Calculate SHA-256, SHA-384, SHA-512, SHA-1 or MD5 for a local file.

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Hash verifier

Compare two digest values without case or spacing mistakes.

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HMAC generator

Generate an HMAC using SHA-256, SHA-384 or SHA-512.

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Caesar cipher

Shift letters forward or backward through the alphabet.

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ROT13 converter

Apply the reversible ROT13 letter substitution.

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Vigenère cipher

Encode or decode a classical repeating-key cipher.

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Base64 converter

Convert UTF-8 text to and from Base64.

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Text and hex

Convert UTF-8 text to hexadecimal bytes and back.

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Text and binary

Convert UTF-8 text to 8-bit binary bytes and back.

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UUID generator

Generate cryptographically random version-4 UUIDs.

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Secure token

Generate random hexadecimal or URL-safe tokens with browser cryptography.

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CRC32 calculator

Calculate a CRC32 checksum for text.

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Clear answers

About computing & cryptography tools

Are the computing & cryptography tools free?

Yes. Every tool in this collection is free to use without an account.

Does MW SysArc receive what I enter?

No. Inputs and calculations remain inside your browser and are not transmitted to or stored by MW SysArc.

Can I use the results for important decisions?

Treat results as practical estimates. Verify consequential academic, employment, financial or access decisions against the applicable rules and source records.