Fix Broken JSON, XML, YAML, CSV — Mock Webhook APIs · yellorn

Repair broken JSON, XML, YAML, and CSV instantly. 29 auto-fix passes recover messy data from LLMs, log dumps, and Excel exports. Convert across formats, publish payloads as mock REST APIs, dispatch HTTP requests with saved templates, and sync your workspace across devices.

Data Doctor — repair broken structured data instantly

• 29 documented auto-fix passes across four formats: 15 for JSON (markdown fences, comments, Python literals, single quotes, unquoted keys, trailing commas, missing commas, auto-close brackets, Python timestamps / datetime / Decimal / tuples / sets), 5 for XML, 6 for YAML, 3 for CSV.
• LLM output cleanup — paste JSON from ChatGPT, Claude, or any LLM. Markdown fences and explanatory comments are stripped automatically; Python-style None / True / False are normalised; smart quotes from rich-text pastes are replaced.
• Server-log recovery — recover concatenated JSON documents glued by bad \X escapes and truncated "response": "{... log lines via the Smart Format catch path.
• Excel-on-Windows BOM removal — every UTF-8-BOM CSV export from Excel is repaired so the first column header doesn't end up as \uFEFFColumnName.
• Auditable fixes — every applied repair is labelled in the status bar ("Auto-fixed: trailing-commas, single-quotes, unquoted-keys"), so the user reviews and consents before publishing.

Cross-format converter — JSON ↔ XML ↔ YAML ↔ CSV

• Convert JSON to XML, YAML, or CSV with a single click; CSV → JSON emits row-of-objects; XML → JSON preserves @_attr / #text / #cdata conventions.
• Python-dict clipboard export from every format (datetime roundtrips through datetime.fromisoformat, Decimal, tuples, sets).
• Lossy-conversion warnings (e.g. CSV ← deeply-nested JSON) surface a confirmation toast before re-shaping.
• Atomic undo — one Cmd+Z reverts both the text and the active format together.

Mock webhook REST API — publish payloads as live endpoints

• Click Publish, get a Cloudflare-edge HTTPS URL. All HTTP methods accepted at the slug; configurable response status code (200 / 401 / 429 / 500) to simulate failure paths.
• Format-aware Content-Type — publish XML and the URL serves application/xml; publish CSV and it serves text/csv.
• Owner-only request log portal at /webhook/<slug>: see method, headers, body, source IP, and timestamp for every incoming request.
• Free tier ships 5 active URLs with 24h TTL; Pro subscribers get 1,000 new URLs/month with persistent TTL while the subscription is active; Team gets 10,000/month at 300K calls/day.

Multi-view visualizer + JMESPath search

• Tree view — virtualized via react-window, supports inline edit, hover-menu actions (copy JMESPath path, copy value, set null, delete), and search highlighting.
• Graph view — node-link diagram via React Flow + Dagre layout in a worker; collapse / expand subgraphs.
• Table view — sortable header (worker-backed sort for large datasets), cell edit, copy column / row.
• JMESPath playground — type users[?age > `30`].name in the search bar to filter the tree live; match counts and Prev/Next navigation.

Request Sender — compose and dispatch HTTP requests

• Send GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS requests directly from the browser with full header, auth, and body configuration.
• Save request templates for reuse — name, method, URL, headers, auth, and body are all persisted per account.
• Execution history tracks every dispatch with status, timing, response headers, and truncated response body (up to 1 MB).
• Built-in SSRF protection and loop guard prevent abuse; the sender adds an X-Yellorn-Internal-Dispatch header to block recursive calls to your own webhooks.

Cloud Backup — tabs, palette, and layout across devices

• Use Cloud Backup in the Account panel to back up your open tabs, pane split ratio, and active palette to every signed-in browser.
• Per-tab sync status badges in the tab bar show which tabs are synced, local-only, or too large to sync.
• Sync is quota-aware — usage bar and limits are visible in the Account panel.

Compare mode + smart format ladder

• Compare two tabs in Monaco's read-only diff editor (JSON sorted before diffing for stable output).
• Smart Format (Cmd+Shift+F) — full recovery + unwrap + type-convert.
• Simple Format (Alt+Shift+F) — semantic preservation; pretty-print without changing types.
• Safe Format — layout-only indent / line breaks; never re-parses.
• Compress (Alt+Shift+C) — minify whitespace.