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CLUSTER JSON-CONVERTER-ENCODING · 46 ENTRIES · EARLIEST ENTRY 2026-03-28

JSON formatting and validation tools

This cluster comprises web-based utilities for developers to format, validate, explore, and manipulate JSON data, often featuring syntax highlighting, tree views, and validation tools. The dated entry history before the index start is sparse and irregular, with entries appearing intermittently from February 2019 to June 2026. In terms of traction, nd-viewer leads with 5 stars, followed by ittools with 1 star and edge-json-formatter with 0 stars.

Entry timeline

ENTRY TIMELINE

FEB 2019: 1DEC 2019: 1MAR 2021: 1JAN 2022: 1SEP 2022: 1NOV 2022: 1JUL 2024: 1FEB 2025: 1AUG 2025: 1DEC 2025: 1FEB 2026: 1MAR 2026: 1JUN 2026: 1AUG 2026: 18SEP 2026: 13OCT 2026: 2
FEB 2019OCT 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 4 ai-built · 1 hand-coded · 15 unlabelled

Operator · 4 hobby · 6 open source · 10 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 20 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 21UnSaaSS_FreeCodeCamp1★1 yrabandonedlivehobbyOffline viewer that imports FreeCodeCamp JSON data files and renders them locally like the standard FreeCodeCamp website.
  2. 22AppForge0★4 moliveTool that turns JSON configuration into a deployable full-stack SaaS application with database, preview, and validation.
  3. 23mdq0★6 mostaleliveopen sourceQuery tool that finds specific elements in Markdown documents similar to jq for JSON.
  4. 24nodejs-jsonschema2md0★6 mostaleliveopen sourceCommand-line tool that converts JSON schema definitions into human-readable Markdown documentation.
  5. 25json-sorter-studio0★7 mostale—ai-builthobbyWeb tool that sorts and organizes JSON data for easier reading and editing.
  6. 26quickdevtools0★6 mostaleliveai-builthobbyWeb-based JSON viewer and editor offering formatting, validation, comparison, and statistics tools for developers working with JSON data.
  7. 27Json List0★7 mostaleliveopen sourceAndroid app that previews JSON from files or URLs in a user-friendly list format with search and editing.
  8. 28json-tui0★8 mostaleliveopen sourceTerminal interface that displays and filters JSON data interactively for viewing and exploration.
  9. 29twig0★1 moliveopen sourceTerminal tool that lets developers inspect, navigate, and search through complex or deeply nested JSON files interactively.
  10. 30Black Fennec0★3 yrabandonedlivehand-codedopen sourceDesktop tool that visually views and edits semi-structured data files like JSON.
  11. 31JSON Tree Viewer | نمایش درختی JSON0★unknownliveWeb application that visualizes JSON data as an interactive tree diagram with zoom and animation.
  12. 32get-jwt.vercel.app0★unknownliveWeb tool that generates JSON Web Tokens for developers and authentication workflows.
  13. 33JSON Viewer and Formatter0★unknownliveai-builtWeb app for developers to format, validate, and explore JSON data with syntax highlighting and interactive tree view.
  14. 34JSON Formatter & Validator - Fast, Free, Open Source Tool0★unknownliveai-builthobbyFormats, validates, and minifies JSON data, providing a simple web interface for developers to clean up and check syntax.
  15. 35Privacy Policy | JSON Toolbox0★unknownliveWeb toolbox offering a collection of JSON formatting, validation, and manipulation utilities for developers.
  16. 36JSON View Online0★unknownliveWeb app that lets users view, format, and explore JSON data in a readable interface.
  17. 37JSONHero - Format, Validate & Transform JSON0★unknownliveBrowser-based tool that formats, validates, views, diffs, minifies, and converts JSON data without requiring signup.
  18. 38JSON Sorter0★unknownliveWeb application that sorts JSON object keys and displays the reordered JSON output.
  19. 39JSON Schema Minimalizer0★unknownliveWeb tool that reduces JSON schemas to the bare essentials.
  20. 40JSONera - JSON Formatter & Validator0★unknownliveOnline tool that formats, validates, and beautifies JSON data for developers working with JSON files.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.