Bytes, text, and secrets
Encoding & Crypto Tools
These tools distinguish reversible encoding from hashing and secure random generation. Every tool in this category runs locally and explains the relevant security boundary.
Available now
Working encoding & crypto tools
Each tool opens directly and states where its processing happens.
Base64 Encode & Decode
Convert text or files to and from Base64.
URL Encoder and Decoder
Encode or decode URL components and inspect query parameters.
HTML Entity and Unicode Converter
Encode HTML entities and convert text to Unicode escapes.
String Escape and Unescape
Escape or unescape JSON, JavaScript, Java, .NET, XML, CSV, and SQL text.
Hash Generator
Calculate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 together.
File Checksum Calculator
Calculate and verify MD5 or SHA checksums for local files.
JWT Decoder and Verifier
Decode JWT headers and claims, inspect expiry, and verify HMAC signatures.
Password Generator
Create strong passwords with clear entropy controls.
Which tool should you choose?
| Need | Choose | Reason |
|---|---|---|
| Represent bytes as text | Base64 | Supports standard and URL-safe alphabets. |
| Escape a URL or markup | URL Encoder or HTML Entities | Applies the correct format-specific escaping. |
| Fingerprint data | Hash Generator or File Checksum | Calculates MD5 and SHA digests locally. |
| Inspect a token | JWT Decoder | Shows claims, expiry, and optional HMAC verification. |