All 99 JSON tools

the complete index · grouped by job · free, no account needed

Every tool on the site, in one list. Type in the box to filter by name or by what a tool does — or press / anywhere on the site to open the same search as an overlay. Each group below has its own page with the six most-used tools described in more detail.

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Format / Validate 8

JSON formatter Pretty-print with 2 / 4 / tab indent and optional key sort.
JSON minifier Strip whitespace and see the byte savings.
JSON validator Strict RFC 8259 check with line / column errors.
JSON repair Fix trailing commas, single quotes, unquoted keys, comments.
JSON stringify Escape a document for embedding in source code.
JSON5 → JSON Parse JSON5 (comments, unquoted keys, trailing commas) to strict JSON.
JSONC → JSON Strip // and /* */ comments from tsconfig-style JSON.
Canonicalize + hash RFC 8785 JCS canonical form plus a SHA-256 digest.

Convert 23

JSON → CSV Array-of-objects to CSV with a column picker.
CSV → JSON CSV to a JSON array with type inference.
JSON → TSV Tab-separated output for spreadsheets and Postgres COPY.
TSV → JSON Tab-separated text to a JSON array.
JSON → YAML Block or flow YAML with key order preserved.
YAML → JSON YAML 1.2 to JSON, anchors resolved.
JSON → XML Configurable attribute prefix and array handling.
XML → JSON XML to JSON with attribute and text-node control.
JSON → TOML Tables and array-of-tables for pyproject / Cargo.
TOML → JSON TOML config to JSON.
JSON → NDJSON Flatten an array into one object per line.
NDJSON → JSON Collect newline-delimited JSON into one array.
JSON → Base64 Standard or URL-safe Base64.
Base64 → JSON Decode and pretty-print Base64 payloads.
JSON ↔ MessagePack Encode to MessagePack bytes and decode them back, hex or base64.
JSON ↔ CBOR Encode to CBOR (RFC 8949) and decode it back, hex or base64.
MongoDB Extended JSON ObjectId, ISODate and $oid / $date documents to plain JSON and back.
JSON → HTML table Semantic <table> markup you can paste into a page.
JSON → Markdown table GitHub-flavoured pipe table for READMEs and tickets.
HTML table → JSON Scrape a pasted <table> into a JSON array.
JSON → Excel A real .xlsx workbook, typed cells and a frozen header.
JSON → ES bulk Elasticsearch / OpenSearch _bulk NDJSON request body.
JSON → HCL Terraform configuration syntax with heredocs.

Config formats 8

JSON → INI Sections and key = value pairs.
INI → JSON INI / .cfg sections to nested JSON.
JSON → .env Flatten to dotenv KEY=value lines.
.env → JSON Parse dotenv into JSON, nesting on __ or dots.
JSON → .properties Java properties with Unicode escaping.
.properties → JSON Java properties back to nested JSON.
JSON → query string URL-encoded query with bracket or dot nesting.
Query string → JSON Parse a URL or query string into JSON.

Transform 18

Sort keys Recursive alphabetical sort for stable diffs.
Flatten Nested objects to dot / bracket keys.
Unflatten Dot / bracket keys back to nested objects.
Deep merge Merge documents with picky conflict strategies.
Extract Pull keys or values by literal, glob or regex.
Escape Backslash-escape into a JSON string literal.
Unescape Turn an escaped string back into JSON.
Convert key case camelCase ↔ snake_case ↔ kebab ↔ PascalCase, recursively.
Rename keys Bulk-rename or drop keys by exact name or regex.
Remove nulls Strip nulls, empty strings, arrays and objects.
Dedupe array Remove duplicate elements, whole-value or by key.
Filter array Keep or drop records with a small expression language.
Array ↔ object Key an array by a field, or split an object back out.
Sort array Order elements by one or more fields, stable and type-aware.
Group & aggregate GROUP BY with count, sum, average, min, max, median.
Set operations Union, intersection and difference of two arrays.
Redact Mask or remove secrets by key name, pattern or value.
Prune Cap depth, array length, string size and keys per object.

Query / Explore 7

jq playground Full jq filter language in WebAssembly.
JSONPath tester RFC 9535 and legacy Goessner dialects.
JMESPath tester The query language the AWS CLI, Ansible and Azure CLI use.
JSON Pointer Resolve RFC 6901 pointers and list every pointer.
List all paths Every leaf path with its type and value.
Tree viewer Collapsible explorer with copy-path.
Graph view Force-directed / tree render, exports SVG.

Diff / Patch 3

Diff Semantic compare that ignores key order.
JSON Patch Generate and apply RFC 6902 operations.
Merge Patch Generate and apply RFC 7396 merge patches.

JSON Schema 11

Schema generator Infer draft 2020-12 schema from samples.
Schema validator Validate data against a schema, all drafts.
Schema visualizer Diagram a schema with $ref resolution.
Schema faker Generate realistic fake data from a schema.
Schema → types TypeScript / Zod / Pydantic / Go / Rust.
Schema diff Compare two schemas and flag breaking changes.
Schema → Markdown Readable field tables for a README or docs site.
Migrate draft Draft-04 / 06 / 07 up to 2020-12.
Bundle $refs Inline external refs into one self-contained schema.
Schema → OpenAPI Emit an OpenAPI 3.0 or 3.1 component schema.
OpenAPI extract Pull every component schema out of an OpenAPI spec.

Generate types 17

JSON → TypeScript Interfaces or types, optional readonly.
JSON → Zod Zod schema plus inferred TS type.
JSON → Python Pydantic v2, dataclass or TypedDict.
JSON → Go struct Structs with JSON tags and omitempty.
JSON → Rust serde structs with Option for nullable.
JSON → Java POJOs or records with Jackson annotations.
JSON → Kotlin Data classes with kotlinx.serialization.
JSON → C# Classes or records with System.Text.Json.
JSON → Swift Codable structs with CodingKeys.
JSON → Dart Classes with fromJson / toJson.
JSON → PHP Typed classes or a plain array literal.
JSON → Ruby Hash literal, Struct, or a class with from_json.
JSON → GraphQL SDL types inferred from a sample payload.
JSON → Protobuf proto3 messages with numbered fields.
JSON → Avro Avro record schema with nullable unions.
JSON → SQL INSERT INSERT statements for Postgres / MySQL / SQLite.
JSON → CREATE TABLE DDL with column types inferred from the data.

Inspect 5

Size analyzer Raw / minified / gzip sizes and the heaviest keys.
Stats Counts, type histogram, depth, longest key.
JWT decoder Decode header and claims, check expiry, no upload.
Number precision Find int64 ids and decimals that lose digits when parsed.
Sample JSON Small public-domain JSON files to test with.

Nothing matches that. Try a format name (csv, yaml, toml) or a verb (merge, flatten, validate).

Can't find it?

If a tool you expected is missing, it may live on a sibling site rather than here — line-delimited JSON work is on jsonlkit.com, and spreadsheet-shaped work on csvkit.org. Otherwise tell me what you needed; that is where most of this list came from.