zippydevtoolsEncoding
Base64 and URL encoding/decoding tools
Encode, decode, and inspect URL, Base64, and JWT values used in API calls, webhooks, headers, and query strings. Use the paired tools to move between encoded values and readable debugging output.
Priority tools
Start with the most common workflows in this category, then move to adjacent tools when needed.
Base64 Encode
Encode UTF-8 text into Base64 directly in the browser for tests, headers, and payloads.
Base64 Decode
Decode standard Base64 or Base64URL into UTF-8 text in the browser with explicit normalization and invalid-input diagnostics.
URL Encode
Encode text, query parameters, and URL segments with percent-encoding for copy-ready URLs.
URL Decode
Decode percent-encoded query strings, paths, and fragments back into readable text.
JWT Decode
Decode JWT header and payload JSON locally, then inspect algorithms, audiences, and registered time claims without signature validation.
Recommended workflows
Contextual links for combining tools without leaving the cluster.
Inspect encoded API values
Decode Base64 or URL-encoded values, then validate JSON or inspect a JWT payload when the decoded output needs more context.
Prepare query strings
Encode unsafe characters for URL components and decode received values when debugging redirects, callbacks, or webhook URLs.
Round-trip Base64 text
Encode UTF-8 text for a transport field, then decode it back to verify accents, symbols, and padding.
Related guides
Explanatory content for choosing the right workflow before opening a tool.
Base64 Encode
Encode UTF-8 text into Base64 directly in the browser for tests, headers, and payloads.
Base64 Decode
Decode standard Base64 or Base64URL into UTF-8 text in the browser with explicit normalization and invalid-input diagnostics.
CSS Color Converter
Detect and convert CSS colors between RGB, RGBA, HEX, HEXA, HSL, and HSLA, including modern syntax.
JWT Decode
Decode JWT header and payload JSON locally, then inspect algorithms, audiences, and registered time claims without signature validation.
URL Encode
Encode text, query parameters, and URL segments with percent-encoding for copy-ready URLs.
URL Decode
Decode percent-encoded query strings, paths, and fragments back into readable text.