JSON tools
Every free tool that works with JSON files: convert, compress, edit and more, all in one place.
25 tools for JSON files
All free, all private. Open any tool to get started.
JSON Formatter
Format, validate and minify JSON in your browser with pinpoint error line + column, jump-to-error, key sorting and live editing: nothing is uploaded.
JSON Validator
Validate JSON against RFC 8259 with the exact error line, column and a caret under the bad character. Get plain-English explanations, one-click auto-fix for trailing commas and single quotes, plus depth, key-count and type stats, nothing uploaded.
JSON Tree Viewer
Explore JSON as an interactive, collapsible tree. Expand or collapse any branch, see type and array-length badges, search keys and values with live highlighting, and copy any node's value or its JSONPath in one click, all 100% in your browser.
JSON Diff
Compare two JSON documents by structure, not text. Reordered keys and whitespace are ignored. You see added, removed and changed values by path with counts, all in your browser.
JSON to TypeScript
Convert JSON to TypeScript interfaces or types instantly, with merged unions across array items, optional-from-null, readonly, export and naming controls, 100% in your browser.
YAML Formatter
Format, clean and re-indent YAML in your browser, or convert YAML ↔ JSON, with key sorting, flow/block style and the exact error line + column. Nothing is uploaded.
JWT Decoder
Decode and inspect any JSON Web Token instantly. Read the header, payload and signature, see when it was issued and expires, and optionally verify an HS256 signature. 100% in-browser. Your token never leaves your device.
Schema Markup Generator
Generate valid JSON-LD structured data for Article, FAQ, Product, Organization, LocalBusiness, Event and more, with a live rich-results validity check and a copy-ready script tag. 100% in your browser.
FAQ Schema Generator
Turn a list of questions and answers into valid FAQPage JSON-LD structured data, with a live validity check for the Google FAQ rich result and a copy-ready script tag. 100% in your browser.
Article Schema Generator
Generate valid Article, BlogPosting and NewsArticle JSON-LD structured data: with author, publisher, dates, images and keywords, a live SERP preview and a rich-results validity check. 100% in your browser.
Product Schema Generator
Generate valid Product JSON-LD structured data with Offer price, availability and AggregateRating, for price and star-rating rich results in Google. Live validity check, copy-ready script tag, 100% in your browser.
Organization Schema Generator
Build valid Organization JSON-LD structured data (name, logo, URL, sameAs social profiles and typed contact points) with a live validity check and a copy-ready script tag. 100% in your browser.
LocalBusiness Schema Generator
Build valid LocalBusiness JSON-LD structured data (address, geo coordinates, a full opening-hours table, price range and social profiles) with a live validity check and a copy-ready script tag. 100% in your browser.
SoftwareApplication Schema Generator
Generate valid SoftwareApplication JSON-LD for apps, SaaS and games (category, operating system, price and star rating) with a live rich-results validity check and a copy-ready script tag. 100% in your browser.
Review Schema Generator
Generate valid Review JSON-LD structured data (reviewed item, author, star rating and review body) with a live star preview, a required-property check and a copy-ready script tag. 100% in your browser.
Person Schema Generator
Generate valid Person JSON-LD structured data (name, job title, employer, bio and sameAs profile links) with a live validity check and a copy-ready script tag. 100% in your browser.
Event Schema Generator
Generate valid Event JSON-LD structured data (dates, venue or virtual location, organizer, performer and ticket offers) with a live rich-results validity check and a copy-ready script tag. 100% in your browser.
Breadcrumb Schema Generator
Build valid BreadcrumbList JSON-LD from an ordered trail of pages, with a live Google-style breadcrumb preview, auto-numbered positions and a copy-ready script tag. 100% in your browser.
Video Schema Generator
Generate valid VideoObject JSON-LD structured data (name, thumbnail, upload date, duration and content URL) with a live check for Google video rich results. ISO-8601 duration handled for you, 100% in your browser.
Recipe Schema Generator
Generate valid Recipe JSON-LD structured data for Google's recipe rich result: ingredients, steps, prep/cook times, yield, nutrition and star ratings, with a live eligibility check and copy-ready script tag. 100% in your browser.
JSON-LD Validator
Paste your JSON-LD structured data to validate it, parse errors, missing @context/@type, and the required & recommended properties each schema.org type needs for rich results, plus a re-formatted copy. 100% in your browser.
CSV to JSON
Convert CSV to JSON in your browser. Paste or drop a.csv and get a clean array of objects or arrays with a header toggle, optional number/boolean type inference and pretty or minified output. Nothing is uploaded.
JSON to CSV
Convert JSON to CSV in your browser. Paste an array of objects and get a spreadsheet-ready CSV with a header row, automatic flattening of nested keys, and a choice of comma, semicolon or tab delimiter. Copy or download instantly. Nothing is uploaded.
AI Schema Checker
Audit a page's JSON-LD against the seven schema types AI retrieval leans on, verify each one's load-bearing properties, and get every gap routed to the GigAI generator that fills it. A checker, not another generator.
GigAI IconLab
Build your own icon system, define a family's design language once, then keep adding icons that match it, months apart. AI helps with unusual concepts. The drawing is always deterministic.
Browse by file type
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