JSON Tools

Decode a Base64 string back into pretty-printed JSON.

Decode Bencode text (the format BitTorrent .torrent files use) into JSON.

Decode hex-encoded BSON bytes back into a readable JSON document.

Parse a CSON (CoffeeScript Object Notation) document's indented blocks and inline arrays into JSON.

Convert CSV rows into a JSON array of objects, using the header row as keys.

Decode a data:application/json;base64,... (or percent-encoded) URI back into pretty-printed JSON.

Generate realistic fake JSON data from a template whose values are type-hint keywords.

Parse application/x-www-form-urlencoded text, including bracket-path field names, into nested JSON.

Parse INI text (sections, key=value lines, comments) into a JSON object.

Run a practical subset of jq filters against JSON in the browser: field access, streams, and a fixed builtin list.

Get structural statistics for a JSON document: depth, key counts, type breakdown, and size.

Compare two JSON arrays and see what's only in A, only in B, and in both.

Collapse nested arrays into a single-level array.

Group a JSON array of objects into buckets keyed by one of their shared property values.

Concatenate two JSON arrays, with an option to drop duplicate items.

Shuffle the top-level order of a JSON array's items using Fisher-Yates.

Turn a short word or phrase into a deeply nested JSON object where nesting depth mirrors its length.

Compare two JSON documents and see exactly what changed.

Convert single-quoted JS-object-literal-like text back into valid double-quoted JSON.

Edit JSON in a text panel with a live, color-coded structure view alongside.

Deliberately corrupt valid JSON with random syntax mutations for testing error handling.

Escape JSON text into a quote-free fragment for embedding in another string.

Check whether two JSON documents are byte-identical or semantically equal, with a capped diff summary.

Filter a JSON array of objects using a simple key OP value expression.

Best-effort repair for common JSON mistakes: comments, trailing commas, unquoted keys, single quotes.

Format and beautify messy JSON with proper indentation.

Add syntax-colored highlighting to JSON for docs, blogs, and slides.

List every unique object key found anywhere in a JSON document.

Search a JSON document for a substring across every key, every value, or both, with paths.

Invert a flat JSON object so every value becomes a key and every key becomes a value.

Strip whitespace from JSON to reduce payload size.

Find the maximum nesting depth of a JSON document and the exact path that reaches it.

Replace keys with generic names and scramble string/number values, preserving structure.

Collapse a nested JSON object into a single flat object with dot/bracket path keys.

Recursively sort every object's keys alphabetically, ascending or descending.

Merge two JSON objects, either shallowly (B's keys win) or deeply (nested objects merge too).

Shuffle a JSON object's key order using Fisher-Yates, keeping every value attached to its key.

Rebuild a nested JSON object or array from flat dot/bracket path keys like a.b[0].c.

Query JSON data with JSONPath and see matches live.

Best-effort repair of single-quoted, curly-quoted, or unquoted-key JSON-like text into valid JSON.

Redact values whose key name looks sensitive (password, token, email, ssn, etc.).

Generate a JSON Schema (draft-07) from a JSON sample.

Turn JSON into a shareable, styled screenshot with a gradient background and title bar.

Replace every structural double quote in pretty-printed JSON with a single quote.

Format JSON so purely-scalar objects/arrays collapse onto one padded line, others stay multi-line.

Replace every string value with asterisks, keeping structure and keys intact.

Wrap JSON text as a single quoted, escaped string literal.

Render a JSON document as a plain ASCII tree, with every value's type shown inline.

Convert valid JSON into relaxed JS-object-literal syntax with unquoted identifier keys.

Strip ALL JSON punctuation and quotes, leaving only a flat, space-separated word list.

Base64-encode a JSON document's raw UTF-8 bytes.

Encode a JSON value as Bencode, the encoding BitTorrent .torrent files use.

Encode a JSON object as BSON, the binary format MongoDB uses on the wire.

Render a JSON object as CSON (CoffeeScript Object Notation): indented blocks, bare keys, inline scalar arrays.

Convert a JSON array of objects into CSV.

Encode JSON as a data:application/json;base64,... URI you can embed directly in HTML, CSS, or a link.

Flatten a JSON object into application/x-www-form-urlencoded text with bracket-path keys.

Generate Go structs with json struct tags from a JSON sample.

Render JSON as semantic HTML: objects become definition lists, arrays become unordered lists.

Render syntax-highlighted JSON as a downloadable PNG image.

Convert a JSON object into classic INI format with sections and key=value lines.

Convert a JSON array into JSON Lines (JSONL): one compact JSON value per line.

Render a JSON array of objects as a LaTeX tabular table, ready to paste into a document.

Convert a JSON array into a plain line-by-line list, no brackets, quotes, or commas.

Serialize JSON into a Lua table literal, the exact inverse of the Lua to JSON Table parser.

Encode JSON as hex-dumped MessagePack using the smallest fixed-size encoding for every value.

Render JSON as a PHP array literal using modern short-array syntax, ready to paste into PHP source.

Flatten JSON into dot-notation key=value lines (Java .properties format).

Encode JSON as protobuf wire-format bytes without a .proto schema, with a field-number legend.

Generate nested Python @dataclass definitions from a JSON sample.

Scan JSON string values for patterns commonly seen in SQL injection attempts.

Turn JSON into an indented, punctuation-free plain-text outline.

Convert a JSON object into a TOML document with tables and array-of-tables.

Convert JSON to TOON, a compact format designed to use fewer LLM tokens.

Flatten a JSON array into tab-separated rows.

Generate TypeScript interfaces from a JSON sample.

Generate nested TypeScript interfaces from a JSON sample.

Encode a JSON value as UBJSON (Universal Binary JSON), shown as a hex dump.

Convert JSON data into well-formed XML markup.

Convert JSON into clean, block-style YAML.

Generate a Zod schema and inferred TypeScript type from a JSON sample.

Break JSON text into its raw lexical tokens: braces, brackets, strings, numbers, and literals.

Cap a JSON document's nesting depth, array length, and string length, marking every cut.

Reverse JSON escaping to recover the original text from an escaped fragment.

Decode a quoted JSON string literal back into its original text.

Decode a percent-encoded JSON value back into pretty-printed JSON.

Percent-encode JSON so it's safe to use as a URL query parameter.

Check whether your JSON is syntactically valid.

List every leaf value found anywhere in a JSON document.

Parse JSON Lines (JSONL/NDJSON) text, one JSON value per line, into a single JSON array.

Convert a plain newline-separated list into a pretty-printed JSON array of strings.

Check LLM-generated JSON against practical guardrails before you parse it.

Parse a Lua table literal into equivalent JSON.

Decode hex-encoded MessagePack bytes back into readable JSON.

Parse a PHP array literal (short [...] or array(...) syntax) into JSON.

Parse a Java .properties file into nested JSON.

Decode hex-encoded protobuf bytes into JSON with generic field1, field2 labels, no schema needed.

Generate a random flat JSON array of numbers, strings, booleans, or a mix.

Generate a random flat JSON object with a chosen number of realistic-looking keys.

Split raw text by a delimiter into a JSON array of trimmed, non-empty strings.

Parse a TOML document (tables and array-of-tables included) into JSON.

Convert tab-separated rows into a JSON array of objects, using the header row as keys.

Decode hex-encoded UBJSON (Universal Binary JSON) bytes back into JSON.

Convert an XML document into equivalent JSON.

Convert a YAML document into equivalent, pretty-printed JSON.