Black Out Text in Photos Online: Permanent Redaction • Zero Alpha Leaks

The Dangerous Myth of "Marking Out" Text with Smartphone Highlighters

• The Smartphone Markup Transparency Trap: Default iOS and Android markup highlighters render at 80%–85% opacity. Even after multiple layered strokes, raising image exposure and brightness reveals the hidden text underneath.
• PDF & Image De-Layering Risks: Standard drawing apps store redaction rectangles on separate vector layers. Recipients can simply select and delete the black box to read the raw text underneath.
• True Bitmap Flattening: MaskMyBody merges your blackout strokes directly into the uncompressed canvas pixel buffer. Target pixels are permanently replaced with 0x00 bytes, making de-layering physically impossible.
• Zero-Server Privacy Guarantee: Redacting tax forms, pay stubs, or driver’s licenses on cloud websites uploads your most confidential PII to remote servers. MaskMyBody runs 100% locally in browser memory.

How to Redact Photos Locally (Step-by-Step)

1. Step 1: Load Document or Screenshot Select any screenshot, receipt, tax form, or ID photo. Your document never leaves your machine.
2. Step 2: Brush Over Sensitive Text Swipe over account numbers, SSNs, passwords, or signatures with true 100% opaque blackout brush strokes.
3. Step 3: Verify Zero Transparency MaskMyBody guarantees zero residual alpha, rendering underlying pixel data completely unrecoverable.
4. Step 4: Export Sanitized Image Save a clean, flattened image with all embedded metadata and hidden text permanently wiped.

Frequently Asked Questions