Does Threshold Image upload my file or text to Tool-You servers?

No. Threshold Image runs in this browser tab. Files stay on the device. Limit note: Cutoff 0–255 luma. Hard black or white. PNG. First GIF frame only. Max 20 MB.

Should I use Grayscale Image instead of Threshold Image?

Use Threshold Image when you need Turn a photo into black and white. Use Grayscale Image when you need Convert a photo to black and white. They share a category (Images) but not the same job.

Threshold Image

Turn a photo into black and white.

Pixels at or above the 0–255 luma cutoff become white; the rest black. Unlike Grayscale this has no mid-grays. Unlike Contrast this is a hard cut. PNG out. First GIF frame only.

What Threshold Image does

Pixels at or above the 0–255 luma cutoff become white; the rest black. Unlike Grayscale this has no mid-grays. Unlike Contrast this is a hard cut. PNG out. First GIF frame only.

This URL is only for Threshold Image (threshold image). Turn a photo into black and white. Other Images tools on Tool-You look similar in the chrome, so the job definition below is the part that belongs to Threshold Image alone: Pixels at or above the 0–255 luma cutoff become white; the rest black. Unlike Grayscale this has no mid-grays. Unlike Contrast this is a hard cut. PNG out. First GIF frame only.

How to use Threshold Image

Stay on this Threshold Image page (/threshold-image). Do not switch to Grayscale Image unless you actually want Convert a photo to black and white..
Add the file type Threshold Image accepts. Hint from the path: threshold image. Turn a photo into black and white.
Set only the options that match Threshold Image. Neighbor Image Contrast does something else (Raise or lower contrast.). Tool note: Pixels at or above the 0–255 luma cutoff become white; the rest black. Unlike Grayscale this has no mid-grays. Unlike Contrast this is a hard cut. PNG out. First GIF frame only.
Run Threshold Image in this tab. Browser memory still applies: Cutoff 0–255 luma. Hard black or white. PNG. First GIF frame only. Max 20 MB.
Download or copy the result from Threshold Image. If it is the wrong job, open Grayscale Image instead.

When not to use Threshold Image

Skip Threshold Image when a neighbor tool matches better — start with Grayscale Image or Image Contrast — or when the description already warns the job will fail. In the tool’s own words: Pixels at or above the 0–255 luma cutoff become white; the rest black. Unlike Grayscale this has no mid-grays. Unlike Contrast this is a hard cut. PNG out. First GIF frame only.

Questions about Threshold Image

What does Threshold Image do that other Images pages on this site do not?: Pixels at or above the 0–255 luma cutoff become white; the rest black. Unlike Grayscale this has no mid-grays. Unlike Contrast this is a hard cut. PNG out. First GIF frame only. Short version: Turn a photo into black and white.
Does Threshold Image upload my file or text to Tool-You servers?: No. Threshold Image runs in this browser tab. Files stay on the device. Limit note: Cutoff 0–255 luma. Hard black or white. PNG. First GIF frame only. Max 20 MB.
Should I use Grayscale Image instead of Threshold Image?: Use Threshold Image when you need Turn a photo into black and white. Use Grayscale Image when you need Convert a photo to black and white. They share a category (Images) but not the same job.
What are the limits of Threshold Image?: Cutoff 0–255 luma. Hard black or white. PNG. First GIF frame only. Max 20 MB. Also: Pixels at or above the 0–255 luma cutoff become white; the rest black. Unlike Grayscale this has no mid-grays. Unlike Contrast this is a hard cut. PNG out. First GIF frame only.