What is the URL Encoder / Decoder?
A URL encoder/decoder converts text into URL-safe percent-encoded format and back into readable text. It helps when working with API endpoints, query strings, redirects, and links containing spaces or reserved characters.
Why people use this calculator
Manual encoding often causes broken links, invalid signatures, and bad API requests. This tool applies reliable UTF-8 encoding rules and strict validation to keep URLs accurate.
How to use the URL Encoder / Decoder  summary
- Paste your input: Enter full URL, query string, or plain text.
- Choose mode and options: Select encode/decode, space handling, safe preset, and optional strict decode.
- Set iterations: Apply processing once or multiple passes for nested-encoded data.
- Process: Get output text plus input/output length metrics instantly.
Tips for best results
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