Redact Image Online — Free & Private
Draw Black Redaction Boxes Over Sensitive Areas. Permanent Coverage. No Uploads — 100% In-Browser.
When to Redact an Image
Documents & Screenshots
- Redact API keys, tokens, and passwords in developer screenshots
- Cover email addresses and phone numbers in documentation images
- Black out account numbers and financial data in statement screenshots
- Redact confidential file paths and system information in tutorials
Identity & Legal
- Cover faces in photos for GDPR-compliant publication
- Redact personal ID numbers and document details before sharing
- Black out signatures on scanned legal documents
- Cover home addresses in property and mapping screenshots
Business & Compliance
- Redact trade secrets and confidential data in product screenshots
- Cover competitor names in internal presentation screenshots
- Black out personal data in HR and payroll system screenshots
- Redact sensitive customer data for compliance report screenshots
How to Redact an Image — 3 Steps
Upload Your Image
Drop any JPG, PNG, or WebP image into the tool — screenshots, photos, documents. Nothing leaves your browser.
Draw Redaction Boxes
Click and drag to draw black rectangles over the areas you want to redact. Add as many boxes as needed. Undo the last box or clear all with one click.
Download the Redacted Image
Click Download Redacted to save the image with all redaction boxes permanently applied. The black areas completely overwrite the original pixel data.
Free Online Image Redaction — Permanent Black Box Coverage
Redaction is the gold standard for removing sensitive information from images and documents. Unlike blur or pixelation — which soften content but don't permanently destroy it — a solid black rectangle completely overwrites pixel data with opaque black. No image enhancement, AI reconstruction, or reverse filter can recover text or faces covered by a proper black redaction box. PicsSizer's redaction tool lets you draw rectangles over sensitive areas directly in your browser. No upload, no account, no server processing.
Why Redaction Is More Secure Than Blur
Blur and pixelation are reversible in principle — there are published techniques for partially recovering content from blurred images, particularly text and known patterns. A solid black box is not reversible: the underlying pixel values are permanently replaced with solid black (RGB 0,0,0). For compliance, legal, and security contexts — redacting API keys, financial data, personal ID numbers, or documents subject to data protection regulations — solid black redaction is the correct approach. Blur should be used for aesthetic softening, not for protecting sensitive information.
Best Practices for Image Redaction
Cover the entire sensitive area with margin to spare — redaction boxes that clip the edges of text or data can leave partial characters visible that may still be legible. For screenshots with multiple instances of the same sensitive data (e.g., an email address appearing in multiple places), draw a separate box over each occurrence. After redacting, verify the download by zooming in on each redacted area to confirm complete coverage before sharing. The Undo button lets you remove the last box if a redaction is placed incorrectly.
More Privacy & Image Tools
Complete privacy toolkit for images and sensitive content.
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Pixelate Image
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Image Metadata Viewer
See all GPS, camera, and identifying data embedded in your images.
Redact Image — Frequently Asked Questions
Common questions about redacting sensitive information from images