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

No. Grayscale Hex runs in this browser tab. Files stay on the device. Limit note: Needs a valid hex color.

Should I use Hex Luminance instead of Grayscale Hex?

Use Grayscale Hex when you need Grayscale hex with gray level. Use Hex Luminance when you need Relative luminance with light/dark tip. They share a category (Design) but not the same job.

Grayscale Hex

Grayscale hex with gray level.

Convert a hex color to luma grayscale and show gray 0–255. Useful for print proofs and accessibility tone checks.

What Grayscale Hex does

Convert a hex color to luma grayscale and show gray 0–255. Useful for print proofs and accessibility tone checks.

This URL is only for Grayscale Hex (design · grayscale hex). Grayscale hex with gray level. Other Design tools on Tool-You look similar in the chrome, so the job definition below is the part that belongs to Grayscale Hex alone: Convert a hex color to luma grayscale and show gray 0–255. Useful for print proofs and accessibility tone checks.

How to use Grayscale Hex

Use Grayscale Hex for this design job (design · grayscale hex). Hex Luminance is adjacent (Relative luminance with light/dark tip.) but not the same.
Add the file type Grayscale Hex accepts. Hint from the path: design · grayscale hex. Grayscale hex with gray level.
Set only the options that match Grayscale Hex. Neighbor Invert Hex does something else (Invert RGB with channels.). Tool note: Convert a hex color to luma grayscale and show gray 0–255. Useful for print proofs and accessibility tone checks.
Run Grayscale Hex in this tab. Browser memory still applies: Needs a valid hex color.
Download or copy the result from Grayscale Hex. If it is the wrong job, open Hex Luminance instead.

When not to use Grayscale Hex

Skip Grayscale Hex when a neighbor tool matches better — start with Hex Luminance or Invert Hex — or when the description already warns the job will fail. In the tool’s own words: Convert a hex color to luma grayscale and show gray 0–255. Useful for print proofs and accessibility tone checks.

Questions about Grayscale Hex

What does Grayscale Hex do that other Design pages on this site do not?: Convert a hex color to luma grayscale and show gray 0–255. Useful for print proofs and accessibility tone checks. Short version: Grayscale hex with gray level.
Does Grayscale Hex upload my file or text to Tool-You servers?: No. Grayscale Hex runs in this browser tab. Files stay on the device. Limit note: Needs a valid hex color.
Should I use Hex Luminance instead of Grayscale Hex?: Use Grayscale Hex when you need Grayscale hex with gray level. Use Hex Luminance when you need Relative luminance with light/dark tip. They share a category (Design) but not the same job.
What are the limits of Grayscale Hex?: Needs a valid hex color. Also: Convert a hex color to luma grayscale and show gray 0–255. Useful for print proofs and accessibility tone checks.