JSON Encoder & Decoder is unclaimed —
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JSON Encoder & Decoder
Format, Validate & Escape·jsonencoderdecoder.xyz
JSON Encoder & Decoder is a browser-based tool that formats, validates, and encodes/decodes JSON. It leniently parses malformed JSON including unquoted keys, single-quoted strings, trailing commas, JS-style comments, and double-encoded strings, showing output in a Monaco editor with syntax highlighting. It can also double-encode a JSON document into a string for embedding inside another JSON payload. All processing happens client-side in the browser with no data sent to a server, and snippets can be saved locally via the browser's localStorage.
What it's for
Pretty-print and clean up malformed or JSON-like textValidate JSON and see parse errors with line/column positionDecode double-encoded JSON strings back to a documentEncode a JSON document into a double-encoded string for embedding in another JSON payloadSave and retrieve JSON snippets locally in the browser
Features 16
- All processing done client-side, no server upload
- Best-effort loose formatting when input can't be fully parsed
- Clear input/output
- Copy Result to clipboard
- Encode a JSON document into a double-encoded JSON string
- Handles double-encoded strings
- Handles JavaScript-style comments
- Handles single-quoted strings
- Handles trailing commas
- Handles unquoted keys
- List, load, and delete saved snippets
- Monaco editor output with syntax highlighting and code folding
- Paste Input from clipboard
- Pretty-print JSON with 2-space indentation
- Save named JSON snippets to browser localStorage
- Shows exact parse error with line/column or character position
Pricing
Tool is entirely free with no paid tiers stated.
FreeFree
Free, client-side, no signup required.