About these converter tools
Data rarely stays in one format for long. A search term becomes part of a URL, a string becomes Base64 for an email attachment or data URI, angle brackets become HTML entities for safe display, and a human date becomes a Unix timestamp for a database. The five converters in this category handle those everyday translations — accurately, instantly and entirely in your browser.
When encoding goes wrong
Most encoding bugs look the same from the outside: garbled text, broken links, 404s on URLs that "look fine". The usual culprits are double-encoding (a value encoded twice, so %20 becomes %2520), encoding the wrong component (escaping an entire URL instead of just the query value), or mangled HTML entities that display literally instead of rendering. The URL Encoder/Decoder offers full-URL and component modes so you encode exactly the right characters, and the HTML Encoder and HTML Decoder make entity problems visible and reversible in one step.
Everyday conversion scenarios
Marketers use these tools to build tracking links with encoded UTM parameters and to sanity-check redirect URLs. Support teams decode customer-submitted URLs to see what the user actually clicked. Developers reach for the Base64 Encoder/Decoder when embedding assets, inspecting JWT payloads or debugging HTTP basic-auth headers — with proper UTF-8 handling and a URL-safe variant for tokens. And anyone staring at a log line full of epoch numbers can drop one into the Timestamp Converter to see the real-world date and time, in seconds or milliseconds, with automatic detection.
Encode vs. encrypt — know the difference
A common and dangerous misconception is that Base64 "hides" data. It doesn't: encoding is a public, reversible transformation designed for transport, not secrecy. Base64 credentials, encoded tokens and escaped HTML are readable by anyone. Because these converters run locally, they're safe to use with real credentials while debugging — but remember that the encoding itself adds zero protection. When your conversion work involves structured data, try our developer tools to format and validate JSON, or the generator tools for UUIDs and test secrets.
