Does Hex String Length upload my file or text to Tool-You servers?

No. Hex String Length runs in this browser tab. Files stay on the device. Limit note: Hex digits only.

Should I use Base64 Byte Length instead of Hex String Length?

Use Hex String Length when you need Length and byte count of hex text. Use Base64 Byte Length when you need Decoded byte length of Base64. They share a category (Convert) but not the same job.

Hex String Length

Length and byte count of hex text.

Counts hex digits and floor(length/2) bytes. Unlike Count Hex Bytes this allows odd length. Bad hex fails.

What Hex String Length does

Counts hex digits and floor(length/2) bytes. Unlike Count Hex Bytes this allows odd length. Bad hex fails.

Practical limit for Hex String Length: Hex digits only. That is why output can differ from heavy desktop Convert software. Read the tool-specific note again: Counts hex digits and floor(length/2) bytes. Unlike Count Hex Bytes this allows odd length. Bad hex fails.

How to use Hex String Length

Keep this tab on Hex String Length (/convert/hex-string-length). Pasting into the wrong Convert tool (for example Base64 Byte Length) changes the job.
Paste or type the input Hex String Length expects. Path hint: convert · hex string length. Length and byte count of hex text.
Apply the Hex String Length action only. Count Hex Bytes is a different transform (Hex byte count with chars and nibbles.). Counts hex digits and floor(length/2) bytes. Unlike Count Hex Bytes this allows odd length. Bad hex fails.
Copy the output of Hex String Length if you need it elsewhere. Size/complexity still follows: Hex digits only.
If the text job is actually Decoded byte length of Base64., leave Hex String Length and open Base64 Byte Length.

When not to use Hex String Length

Skip Hex String Length when a neighbor tool matches better — start with Base64 Byte Length or Count Hex Bytes — or when the description already warns the job will fail. In the tool’s own words: Counts hex digits and floor(length/2) bytes. Unlike Count Hex Bytes this allows odd length. Bad hex fails.

Questions about Hex String Length

What does Hex String Length do that other Convert pages on this site do not?: Counts hex digits and floor(length/2) bytes. Unlike Count Hex Bytes this allows odd length. Bad hex fails. Short version: Length and byte count of hex text.
Does Hex String Length upload my file or text to Tool-You servers?: No. Hex String Length runs in this browser tab. Files stay on the device. Limit note: Hex digits only.
Should I use Base64 Byte Length instead of Hex String Length?: Use Hex String Length when you need Length and byte count of hex text. Use Base64 Byte Length when you need Decoded byte length of Base64. They share a category (Convert) but not the same job.
What are the limits of Hex String Length?: Hex digits only. Also: Counts hex digits and floor(length/2) bytes. Unlike Count Hex Bytes this allows odd length. Bad hex fails.