Can a pixelation blur be reversed?

When implemented correctly, no. Maxisnap uses block-averaging at a large enough block size (configurable) that the original pixel values are lost — not just hidden. This is different from some tools that use a gaussian blur with recoverable source data. If you need forensic-grade certainty, use pixelation (Maxisnap's default blur) rather than a soft gaussian blur.

What's the difference between pixelate and gaussian blur?

Pixelation replaces the region with large solid blocks of averaged color — destructive, irreversible when the block size is large enough. Gaussian blur smears pixel values but preserves per-pixel data; skilled deblurring can sometimes recover the original. For security, pixelation is the safer default.

Blur Screenshot Tool

Blur first.
Share second.

One click to pixelate any region — emails, API keys, faces, IDs. Unrecoverable. Composites over earlier annotations.

Download Maxisnap What to blur

Pixelation · Irreversible · GDPR-friendly

To blur sensitive information on a screenshot — faces, emails, API keys, internal IDs — use a dedicated blur tool that applies a pixelation or gaussian blur over the selected region. Maxisnap's blur tool composites over prior annotations (so the blur can't be undone by removing them) and pixelates at a level that's unrecoverable to reverse-lookup tools, making it safe for sharing in chat, tickets, and documentation.

Blur Before Sharing

What to always blur

Personal email addresses

Customer emails, teammate emails — anything *@*.com in a shared screenshot. One unblurred email in a public Jira ticket is a data leak.

API keys and tokens

sk-*, AKIA*, ghp_*, Bearer *, anything in an Authorization header. Rotate immediately if one escapes; blur before even the first share.

Customer IDs

User UUIDs, account numbers, order IDs, stripe customer IDs. Harmless-looking but often enumerate to a full dataset. Always blur.

Internal URLs

Staging URLs, admin panels, internal dashboards. https://admin-staging-v2.internal/user/1234/edit is both a roadmap leak and a security hint.

Timestamps (sometimes)

When you're demonstrating a bug or a process, exact timestamps can identify the session, the user, or deployment timing. Blur when it's not the point of the screenshot.

Private Slack/Discord handles

Teammate handles, real names in DMs, channels with sensitive topics. Especially if the screenshot will end up in a public GitHub issue or blog post.

Four-step blur workflow

Capture → Select → Drag → Share

01
Capture the screenshot
Press Ctrl+Alt+5 for region or Ctrl+Alt+6 for full screen. The Maxisnap editor opens with your capture loaded.
02
Select the Blur tool
In the toolbar, click the Blur icon (or press the blur hotkey). Your cursor becomes a rectangle selector.
03
Drag across sensitive regions
Click-and-drag over any text, face, ID, or private content. The region pixelates in real time. Repeat for every sensitive area — you can blur as many regions as needed.
04
Save or upload
Ctrl+S to save locally, Ctrl+Alt+7 to upload directly and copy the URL. The blur is committed permanently in the exported image; no one can un-blur the file on the other end.

Frequently asked

Blur screenshot FAQ

How do I blur text on a screenshot?

Capture with Ctrl+Alt+5, click the Blur tool in the editor, drag across the text. Pixelation happens live. Save or upload when done.

Can a blur be reversed?

Maxisnap uses pixelation at a block size that destroys original pixel data — not recoverable by deblurring algorithms. This is stronger than a soft gaussian blur.

Does Maxisnap blur composite over earlier annotations?

Yes — v1.9.0 fix. If you drew an arrow or text before blurring, the blur covers both the underlying pixels and the annotation. Removing the annotation later won't reveal the hidden content.

Pixelate vs gaussian blur — what's the difference?

Pixelation is destructive: large solid blocks of averaged color, irreversible. Gaussian blur smears pixels but preserves data; skilled deblurring can partially recover it. Use pixelation for security.

Is there a GDPR-safe way to blur?

Yes. Use pixelation, not light gaussian blur, over all personal data. Maxisnap's blur meets "data minimization" for screenshots containing personal info: emails, names, customer IDs, avatars.

Stop leaking API keys in screenshots

Download Maxisnap, use the Blur tool on every capture that contains sensitive data, then share with confidence.

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Blur first.Share second.