Data Format Converter

Convert YAML into JSON for APIs, frontend settings, and test fixtures.

Report
Source Format
Target Format
YAML
JSON
Ready. Edit any pane and the other formats will sync automatically.
Paste and sync
Paste into the source or any format pane. The tool parses locally in your browser and refreshes the other formats to match.
Switch conversion direction
When you change source or target with the buttons above, the URL updates so you can bookmark or share a specific conversion scenario.
Format and fix issues
Use “Format Active Pane” to re-indent using the pane you are editing, then resync everything. If one format has a syntax issue, you will see a hint; after you fix it, the panes resync automatically.

Nothing is uploaded to a server. Comments or structures that only exist in one format may not survive a round trip—treat the output as the source of truth.

When is this tool helpful?
When you move between config files, API payloads, and legacy exchange formats and want side‑by‑side views without copying each version by hand.
Why does the URL change when I pick source or target?
Each source→target pair has its own URL, which makes sharing with teammates, writing docs, and keeping bookmarks much clearer.
Will the four formats stay identical after converting?
Objects, arrays, numbers, and booleans usually line up well, but comments, extra attributes on nodes, and some exotic types may not map perfectly everywhere.
Why do other panes change while I edit one?
Auto-sync is intentional: edit the format you like best and let the others rebuild from the same underlying data without pressing a separate “convert” button.
Is my data uploaded?
No. Parsing and formatting stay in your browser, which is handy for private drafts or internal configs.
What should I do if I see an error?
Check which pane reports the problem, then fix common mistakes such as trailing commas, uneven indentation, or unmatched quotes. After you correct it, the panes resync; the other panes can still help you compare.
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