JSON·Tool

JSON Encode & Decode Tool

Format, minify, URL-encode, Base64, and Unicode-escape your JSON — 100% in your browser.

Related tools

JSON Formatterbeautifies and indents messy JSON into a clean, readable structure, with optional key sorting. JSON Minifiercompresses JSON by stripping whitespace to shrink its size for faster transport. Base64 Encoder / Decoderencodes text to Base64 or decodes Base64 back into UTF-8 text. URL Encoder / Decoderpercent-encodes text so it is safe to use in URLs, and decodes it back. Unicode Escape / Unescapeconverts non-ASCII characters into \uXXXX escape sequences, and unescapes them back.

Frequently Asked Questions

What does a JSON encode / decode tool do?

It converts JSON data between different representations — beautifying it for reading, minifying it for transport, or encoding it (URL, Base64, Unicode escape) so it can be safely embedded in URLs, headers, or source code.

Is my JSON data uploaded to a server?

No. All encoding and decoding runs entirely in your browser using JavaScript. Your data never leaves your device, which keeps it private and fast.

What is Unicode escaping in JSON?

Unicode escaping replaces non-ASCII characters (such as Chinese characters or emoji) with \uXXXX escape sequences. This guarantees the JSON stays valid ASCII and is safe to embed anywhere.

Which encodings are supported?

Format / Beautify, Minify, URL Encode / Decode, Base64 Encode / Decode, and Unicode Escape / Unescape — all client-side and free.