Does JSON Key Count upload my file or text to Tool-You servers?

No. JSON Key Count runs in this browser tab. Files stay on the device. Limit note: JSON object only.

Should I use JSON Formatter instead of JSON Key Count?

Use JSON Key Count when you need Count top-level JSON object keys. Use JSON Formatter when you need Pretty-print or minify JSON with indent and optional key sort. They share a category (Convert) but not the same job.

JSON Key Count

Count top-level JSON object keys.

Parses JSON object and counts own keys. Arrays/non-objects fail. Unlike JSON Depth this is key count.

What JSON Key Count does

Parses JSON object and counts own keys. Arrays/non-objects fail. Unlike JSON Depth this is key count.

Practical limit for JSON Key Count: JSON object only. That is why output can differ from heavy desktop Convert software. Read the tool-specific note again: Parses JSON object and counts own keys. Arrays/non-objects fail. Unlike JSON Depth this is key count.

How to use JSON Key Count

Keep this tab on JSON Key Count (/convert/json-key-count). Pasting into the wrong Convert tool (for example JSON Formatter) changes the job.
Paste or type the input JSON Key Count expects. Path hint: convert · json key count. Count top-level JSON object keys.
Apply the JSON Key Count action only. Flatten JSON is a different transform (Dot-path keys from nested JSON.). Parses JSON object and counts own keys. Arrays/non-objects fail. Unlike JSON Depth this is key count.
Copy the output of JSON Key Count if you need it elsewhere. Size/complexity still follows: JSON object only.
If the text job is actually Pretty-print or minify JSON with indent and optional key sort., leave JSON Key Count and open JSON Formatter.

When not to use JSON Key Count

Skip JSON Key Count when a neighbor tool matches better — start with JSON Formatter or Flatten JSON — or when the description already warns the job will fail. In the tool’s own words: Parses JSON object and counts own keys. Arrays/non-objects fail. Unlike JSON Depth this is key count.

Questions about JSON Key Count

What does JSON Key Count do that other Convert pages on this site do not?: Parses JSON object and counts own keys. Arrays/non-objects fail. Unlike JSON Depth this is key count. Short version: Count top-level JSON object keys.
Does JSON Key Count upload my file or text to Tool-You servers?: No. JSON Key Count runs in this browser tab. Files stay on the device. Limit note: JSON object only.
Should I use JSON Formatter instead of JSON Key Count?: Use JSON Key Count when you need Count top-level JSON object keys. Use JSON Formatter when you need Pretty-print or minify JSON with indent and optional key sort. They share a category (Convert) but not the same job.
What are the limits of JSON Key Count?: JSON object only. Also: Parses JSON object and counts own keys. Arrays/non-objects fail. Unlike JSON Depth this is key count.