Online JSON Editor
Write, refactor, and download JSON source in the browser with completions, find, and format helpers.
Completions appear as you type; press Ctrl+Space to open the list. Tab expands snippets where available. Find: Ctrl+F (Cmd+F on Mac). Format: toolbar button or Ctrl+Shift+B for supported languages.
Choose editor font size in pixels
Write, refactor, and download JSON source in the browser with completions, find, and format helpers.
Config object
{
"name": "api",
"version": 2,
"features": { "metrics": true },
"routes": ["/health", "/v1/items"]
} Variables
name = "value"
count = 0Branching
if condition {
action()
} else {
fallback()
}Loops
for item in collection {
process(item)
}Comments
// line comment Parse → transform → emit
// JSON pipeline sketch
const input = readLines();
const output = input
.map(line => line.trim())
.filter(Boolean)
.map(transform);
writeLines(output);Error handling wrapper
// JSON
function runSafely(task) {
try {
return { ok: true, value: task() };
} catch (err) {
return { ok: false, error: String(err) };
}
} - Does JSON code run on ConversionTab servers?
- No. Editing happens in your browser. Download the file and run it in your usual compiler, runtime, or platform.
- Can I change theme and font size?
- Yes. Use the toolbar above the editor; choices persist in local storage for your browser profile.