Encoding & Hash Tools
Encode, decode, and hash data securely with our free browser-based tools. Base64 encoding, URL encoding, HTML escaping, and cryptographic hash generators (MD5, SHA1, SHA256). All processing happens locally – your sensitive data stays private.
Encoding & Hash Tools (8 Tools)
Base64 Encode/Decode
Encode or decode Base64 strings instantly
URL Encode/Decode
Encode or decode URL strings
HTML Escape/Unescape
Encode or decode HTML entities
MD5 Hash Generator
Generate MD5 hash from text input
SHA256 Hash Generator
Generate SHA256 hash from text input
SHA1 Hash Generator
Generate SHA1 hash from text input
JWT Decoder
Decode and inspect JWT tokens without verification
JWT Validator
Validate JWT tokens with signature verification
What Are Encoding & Hash Tools?
Encoding and hashing are fundamental operations in web development, security, and data processing. Encoding transforms data into different formats for safe transmission – Base64 for binary data in text contexts, URL encoding for query parameters, HTML encoding to prevent XSS attacks. Hashing creates fixed-length fingerprints of data for verification, password storage, and integrity checks. JWT (JSON Web Tokens) combine encoding with cryptographic signatures for secure authentication. These operations are needed daily by developers, security professionals, and QA engineers. Our tools provide instant results without exposing your sensitive data to external servers.
Common Use Cases
Security Testing
Decode JWT tokens to inspect claims during authentication debugging. Generate hashes to verify file integrity or test password hashing.
API Development
Base64 encode binary data for JSON payloads, URL encode parameters for query strings, and decode responses for debugging.
Web Security
HTML encode user input to prevent XSS attacks, decode suspicious payloads, and verify content integrity with SHA256 hashes.
Data Verification
Generate MD5 or SHA256 checksums to verify file downloads, compare document versions, or detect data tampering.
Why Use Our Encoding & Hash Tools?
- Decode and validate JWT tokens without exposing secrets
- Generate cryptographic hashes (MD5, SHA1, SHA256) instantly
- Base64, URL, and HTML encoding/decoding in one place
- Perfect for security testing and debugging
- All processing happens in your browser – data stays private
Frequently Asked Questions
What is Base64 encoding?
Base64 is an encoding scheme that converts binary data into ASCII text. It's commonly used to embed images in HTML/CSS, transmit data in URLs, and encode email attachments.
What's the difference between hashing and encryption?
Hashing is one-way – you can't reverse a hash to get the original data. Encryption is two-way – with the right key, you can decrypt data. Hashing is used for verification (passwords, checksums), encryption for secrecy.
Is MD5 still safe to use?
MD5 is not recommended for security purposes (like password storage) due to collision vulnerabilities. However, it's still fine for checksums and non-security uses. For security, use SHA-256 or stronger.
How do I decode a JWT token?
Paste your JWT into our JWT Decoder tool. It will parse the token and display the header, payload (claims), and signature. Note: decoding doesn't verify the signature.