# Blur vs Pixelate: Which Is Safer for Hiding Text in Screenshots?

> The safest way to hide text in a screenshot is to cover it with a solid filled box, or to crop it out. Strong pixelation with large blocks is also effective for short strings. Light blur is the weakest option, because blurred text can sometimes be partly reconstructed. In ClickSnap, use the rectangle tool with a solid fill, or the pixelate tool at a high strength.

Published October 11, 2026 · Updated October 12, 2026 · By Sarangan Raviraj · Canonical: https://clicksnap.live/blog/blur-vs-pixelate-which-is-safer-for-screenshots

## The short version
| Method | How safe | Use for |
| :--- | :--- | :--- |
| Solid filled box | Safest | Passwords, API keys, card numbers |
| Crop it out | Safest | Anything you don’t need to show at all |
| Strong pixelate (large blocks) | Good | Names, emails, short strings |
| Light blur | Weakest | Softening backgrounds, not secrets |

## Why light blur isn’t enough
Blur mixes each pixel with its neighbours, but much of the original information is still there. For short, predictable text such as numbers, keys and emails, people have reconstructed blurred or finely pixelated text by comparing it against candidates. A solid box leaves nothing to reconstruct.

Pixelation is safer when the blocks are large compared with the letters: if each letter becomes one or two blocks, there’s little left to match. Small blocks (where you can still see letter shapes) are almost as weak as blur.

## What about a black highlighter?
A semi-transparent marker can look solid on screen but still let the text show through when someone raises the brightness. If you use a box, make sure it’s fully opaque.

## How to redact in ClickSnap
**Solid box (safest)**
1. Choose the **Rectangle** tool (**R**).
2. Set a **fill colour** and full opacity, then draw over the text.

**Pixelate**
1. Choose **Rectangle Blur / Pixelate** (**X**).
2. Drag over the text.
3. Raise the **strength** so letters become a few large blocks.

**Blur brush (B):** good for softening backgrounds or faces at a distance. Avoid it for secrets.

**Find private data:** click the shield button in the editor. ClickSnap reads the text on your device (nothing is uploaded) and lists emails, API keys, card numbers and IP addresses it finds. Tick the ones to pixelate. It’s a helper, not a guarantee: always check the whole image yourself.

When you export or copy, the covered pixels are replaced in the image file. There are no hidden layers to peel back.

## Before you share, check
- Browser tabs and the bookmarks bar (account names, internal tools)
- Addresses with tokens or IDs
- Notification pop-ups and chat previews
- Avatars and names in comments
- File names and folder paths

## Redaction for bug reports
Teams often share screenshots in Jira, Linear, GitHub and Slack, which many people can see and which are kept for years. Make redaction part of the habit: capture, run **Find private data**, add a solid box for anything secret, then copy. If a key was ever visible in a shared screenshot, rotate it.

## Related
- [Add arrows and numbered steps](/blog/how-to-add-arrows-and-numbers-to-a-screenshot)
- [Copy a screenshot to the clipboard](/blog/how-to-copy-a-screenshot-to-clipboard-chrome)

## Frequently asked questions

### Can blurred text in a screenshot be recovered?

Sometimes. Light blur and small-block pixelation can leave enough information to guess short, predictable text. Use a solid opaque box for secrets.

### Is pixelating a password safe?

Only with large blocks where each letter becomes one or two squares. A solid filled box is safer, and cropping the text out is safest.

### Does ClickSnap upload screenshots to detect private data?

No. Text recognition and private-data detection run on your device; nothing is uploaded.