Does Pad JSON Array upload my file or text to Tool-You servers?

No. Pad JSON Array runs in this browser tab. Files stay on the device. Limit note: Array + target length.

Should I use Slice JSON Array instead of Pad JSON Array?

Use Pad JSON Array when you need Pad a JSON array to a length. Use Slice JSON Array when you need Slice a JSON array by indexes. They share a category (Convert) but not the same job.

Pad JSON Array

Pad a JSON array to a length.

Appends a fill value until length is reached. Unlike Slice JSON Array this grows. Bad length fails.

What Pad JSON Array does

Appends a fill value until length is reached. Unlike Slice JSON Array this grows. Bad length fails.

Practical limit for Pad JSON Array: Array + target length. That is why output can differ from heavy desktop Convert software. Read the tool-specific note again: Appends a fill value until length is reached. Unlike Slice JSON Array this grows. Bad length fails.

How to use Pad JSON Array

Keep this tab on Pad JSON Array (/convert/pad-json-array). Pasting into the wrong Convert tool (for example Slice JSON Array) changes the job.
Paste or type the input Pad JSON Array expects. Path hint: convert · pad json array. Pad a JSON array to a length.
Apply the Pad JSON Array action only. JSON Array Length is a different transform (Length of a JSON array.). Appends a fill value until length is reached. Unlike Slice JSON Array this grows. Bad length fails.
Copy the output of Pad JSON Array if you need it elsewhere. Size/complexity still follows: Array + target length.
If the text job is actually Slice a JSON array by indexes., leave Pad JSON Array and open Slice JSON Array.

When not to use Pad JSON Array

Skip Pad JSON Array when a neighbor tool matches better — start with Slice JSON Array or JSON Array Length — or when the description already warns the job will fail. In the tool’s own words: Appends a fill value until length is reached. Unlike Slice JSON Array this grows. Bad length fails.

Questions about Pad JSON Array

What does Pad JSON Array do that other Convert pages on this site do not?: Appends a fill value until length is reached. Unlike Slice JSON Array this grows. Bad length fails. Short version: Pad a JSON array to a length.
Does Pad JSON Array upload my file or text to Tool-You servers?: No. Pad JSON Array runs in this browser tab. Files stay on the device. Limit note: Array + target length.
Should I use Slice JSON Array instead of Pad JSON Array?: Use Pad JSON Array when you need Pad a JSON array to a length. Use Slice JSON Array when you need Slice a JSON array by indexes. They share a category (Convert) but not the same job.
What are the limits of Pad JSON Array?: Array + target length. Also: Appends a fill value until length is reached. Unlike Slice JSON Array this grows. Bad length fails.