Developer Tools

Free online developer tools: JSON formatter and validator, Base64 and URL encoding, HTML entities, XML formatter and JSON to CSV conversion.

8 tools

Developer tools for the small jobs that come up every day: format and validate JSON, encode and decode Base64 or URLs, escape strings, convert between JSON and CSV, and tidy XML.

They run entirely in your browser, so API responses, tokens and config snippets you paste in are never sent to a server.

Base64 Encode/Decode Developer Tools Encode text to Base64 or decode it back, with correct handling of accents, emoji,… HTML Entity Encoder/Decoder Developer Tools Encode special characters to HTML entities, or decode HTML entities back to plain text… JSON ↔ CSV Converter Developer Tools Convert a flat array of JSON objects to CSV, or CSV back to JSON… JSON Escape/Unescape Developer Tools Escape a raw string for embedding inside a JSON string literal, or unescape one… JSON Formatter Developer Tools Beautify or minify JSON, with adjustable indent and optional alphabetical key sorting — instantly,… JSON Validator Developer Tools Check whether your JSON is valid, with the exact line and column of any… URL Encode/Decode Developer Tools Encode or decode URLs and query-parameter values, with a choice between component encoding and… XML Formatter / Validator Developer Tools Check whether your XML is well-formed and re-indent it for readability — instantly, in…

Frequently asked questions

Is it safe to paste API data into these tools?

The tools run locally in your browser and do not upload your input, but avoid pasting live secrets into any website out of habit.

What is the difference between JSON formatting and validating?

Formatting changes how JSON looks. Validating checks that it is legal JSON and points to the first error.

More categories

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