5 Tools
Encoding & Encryption Tools
Data encoding and basic encryption are fundamental to web development and security. Our encoding tools handle Base64 encode/decode for binary-to-text conversion, URL encoding/decoding for safe URL parameter transmission, classic Caesar cipher rotation for educational purposes, text obfuscation through multiple encoding methods, and JWT decoding to inspect token header, payload, and signature. These tools are designed for learning, debugging, and development workflows — not for protecting sensitive data. All operations happen client-side in your browser.
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Frequently Asked Questions
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode Base64 without a key. It is used to represent binary data in text formats (like email attachments or data URIs), not to protect sensitive information. Never use Base64 to store passwords, credit card numbers, or other confidential data.
What is URL encoding and when is it needed?
URL encoding (percent-encoding) converts characters that are not allowed in URLs into a format that is safe for transmission. Spaces become %20, special characters like & and = are encoded to prevent them from being interpreted as URL parameter delimiters. Use URL encoding when building query strings, form submissions, or any dynamic URL components.
What can I learn from decoding a JWT?
A JWT (JSON Web Token) has three parts: header (algorithm and token type), payload (claims like user ID, expiration, and permissions), and signature (verified with a secret key). Decoding reveals the header and payload in plain text. The signature can only be verified, not decoded — it requires the original signing secret.