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Format, minify, convert and inspect JSON in your browser — CSV, YAML, XML, JWT and GraphQL helpers with no upload.
Your entry point for JSON work in Tentaco: format and validate payloads, convert CSV/YAML/XML, inspect JWTs and tidy GraphQL — all linked from one topic hub. Most tools run locally so API secrets and customer data never hit a formatter server.
Start with JSON Formatter for pretty-print and syntax checks, then branch to converters or JWT inspector as needed.
Format JSON online — free validator & pretty print
Beautify, minify and validate JSON in your browser. Syntax errors with line hints — copy or download instantly.
JSON Pretty Print online — free
Beautify JSON with indentation. Tentaco JSON Pretty Print: review input and get an instant result — free, no sign-up.
CSV to JSON — convert table data
Turn CSV data into structured JSON (and back). Tentaco CSV to JSON Converter: review input and get an instant result — free, no sign-up.
JSON YAML Converter — config transform
Convert between JSON and YAML in both directions. Tentaco JSON ↔ YAML Converter: review input and get an instant result — free, no sign-up.
JSON Minify online — free in your browser
Minify JSON to one line. Tentaco JSON Minify: review input and get an instant result — free, no sign-up.
JSON to TypeScript — generate types from JSON
Generate TypeScript interfaces from a JSON sample. Tentaco JSON to TypeScript: review input and get an instant result — free, no sign-up.
XML to JSON online — free in your browser
Convert XML documents to JSON. Tentaco XML to JSON: review input and get an instant result — free, no sign-up.
JSON to XML online — free in your browser
Convert JSON objects to XML markup. Tentaco JSON to XML: review input and get an instant result — free, no sign-up.
JSON Flatten — nested to dot notation
Flatten nested JSON into dot-notation keys. Tentaco JSON Flatten: review input and get an instant result — free, no sign-up.
JWT Inspector online — free in your browser
Decode JWT header, payload and expiry details. Tentaco JWT Inspector: review input and get an instant result — free, no sign-up.
GraphQL Formatter online — free
Beautify and minify GraphQL queries and mutations. Tentaco GraphQL Formatter: review input and get an instant result — free, no sign-up.
Free developer tools online
Format JSON, test regex, encode URLs, decode JWT and more — everyday coding utilities in the browser.
JSON Schema & OpenAPI tools
Generate JSON Schema from samples, validate payloads and lint OpenAPI specs in one developer workspace.
Database & data format tools
Convert CSV, JSON, SQL snippets and inspect data structures locally.
Browser JSON tools — format, validate and convert
JSON formatter, minifier, CSV/YAML convert and JWT decode — all in your browser tab.
Privacy depends on the selected tool. Check the privacy block on each tool page for file transfer, processing location and storage.
LocalThis tool processes data locally in your browser. Tentaco does not receive your file contents for this mode.
Formatter, minify and most converters run locally. Network is used only when a tool explicitly fetches remote URLs.
Open JSON Formatter to validate syntax, then use linked guides for CSV, YAML, JWT or GraphQL tasks.
Yes — all linked tools are free and require no sign-up.