Every secret stays here.
One simple place.
Generate passwords, check strength, hash text, and decode JWTs in your browser. SmartKitio does not save those values.
What you will find here
Security-oriented utilities generate passwords, check strength heuristics, hash text, and decode tokens locally. They do not replace a password manager, threat model, or professional security review.
Secrets & passwords
Generate and roughly assess passwords on-device.
Hashes & encoding
Digest helpers and encoding utilities for inspectionânot encryption of secrets at rest.
Related guides
Read a longer explanation, then return to a tool when you need a result.
- JSON Formatting and Validation: Complete Guide
- JSON vs JSON5: What's the Difference?
- Base64 Encoding Explained
- Base64 Encoding vs Encryption
Related articles
A longer explanation of an idea these tools rely on.
Popular Security Tools
Our most frequently used tools.
Password
Generate a crypto-random password. Nothing is stored.
Strength
Type a password to get a quick strength rating and an entropy estimate. The password is checked in your browser and is never sent or stored.
SHA-256
Compute the SHA-256 digest of text, for checksums, cache keys, test vectors, or verifying a published hash.
JWT
Decode a JWT header and payload. Decoding does not verify the signature.
Explore Categories
Find exactly what you need by browsing our organized collections.
All Security Tools
Browse every security tools by category, popularity, or name.
JWT Decoder
Decode a JWT header and payload. Decoding does not verify the signature.
Password Generator
Generate a crypto-random password. Nothing is stored.
Password Strength Checker
Type a password to get a quick strength rating and an entropy estimate. The password is checked in your browser and is never sent or stored.
SHA-256 Hash
Compute the SHA-256 digest of text, for checksums, cache keys, test vectors, or verifying a published hash.
Base64 Decoder
Decode Base64 to UTF-8 text locally.
Base64 Encoder
Encode UTF-8 text to Base64 locally.
Hash Generator
MD5, SHA-1, SHA-256, and SHA-512 computed in the browser.
MD5 Hash
Compute the MD5 digest of text, for example to compare it with a checksum published by a legacy system.
Random String Generator
Generate a random string for API keys, test data, invite codes, or file names, from an alphabet you control.
SHA-1 Hash
Compute the SHA-1 digest of text, for example to match an identifier produced by an older system.
SHA-512 Hash
Compute the SHA-512 digest of text when a system or specification asks for SHA-512.
URL Decoder
Decode percent-encoded URLs locally.
URL Encoder
Percent-encode text with encodeURIComponent.
UUID Generator
Generate RFC 4122 version 4 UUIDs with crypto.getRandomValues.