No. Tool algorithms run in your browser. Do not paste real wallet mnemonics or production private keys anyway.

Can I use this in production security workflows?

These tools are for development, testing, and learning. They are not a substitute for audited crypto systems.

How do I find a tool?

Use the home search, header menus (Encoding / Generators / Hash & Cert / Encryption), or a direct URL.

Crypto ToolsWorkbox

Local-first cryptography toolkit for the browser.

Hash, encrypt, encode, and generate keys without uploading secrets. Every tool runs in your browser.

Press / to focus search

Open Hash Tool Read the blog

For development and learning only. Do not paste production keys or wallet mnemonics.

Why Crypto ToolsWorkbox

Local computation

Web Crypto / WASM in the browser. Plaintext, keys, and mnemonics are not sent to a server.

One URL per tool

Share a deep link to AES, Hash, JWT, and more. New tools register in one place.

Privacy-minded storage

localStorage only keeps theme, recent tools, and format prefs — never secrets.

Open & forkable

Built on the ToolsWorkbox shell: Nuxt 4 SSG, Tailwind, shared Header/Footer.

Encryption

AES Encrypt / Decrypt

Ready

AES-128/192/256 with ECB, CBC, or GCM — keys stay local.

RSA Toolkit

Ready

Generate keys, encrypt, decrypt, sign, and verify (PEM).

SM2 / SM3 / SM4

Ready

Chinese national crypto: SM4 encrypt, SM3 hash, SM2 keys & signatures.

Hash & Cert

Hash

Ready

MD5, SHA-1/2/3, CRC32 — compute digests locally.

JWT Decode & Sign

Ready

Inspect Header/Payload, sign HS256/RS256, verify signatures.

X.509 Certificate

Ready

Parse PEM / .crt: issuer, subject, validity, public key.

Entropy Calculator

Ready

Estimate string entropy and password strength.

Encoding

Base Encoding

Ready

Base64, Base32, Base16, Base58, Base85 encode / decode.

URL Encode / Decode

Ready

Percent-encode and decode URL components.

Hex Converter

Ready

String ↔ Hex with formatting helpers.

ASCII / Unicode

Ready

Unicode escapes and ASCII code lookup.

Generators

Random Generator

Ready

UUID, passwords, random bytes, and big integers.

BIP39 Mnemonic

Ready

Generate, validate, and derive seeds — test use only.

FAQ

Is my data uploaded?: No. Tool algorithms run in your browser. Do not paste real wallet mnemonics or production private keys anyway.
Can I use this in production security workflows?: These tools are for development, testing, and learning. They are not a substitute for audited crypto systems.
How do I find a tool?: Use the home search, header menus (Encoding / Generators / Hash & Cert / Encryption), or a direct URL.

Registered tools: 13