Free Online Screenshot Mosaic, Blur & Blackout Tool
Press Ctrl+V to paste a screenshot from your clipboard (or drag & drop an image), then drag across emails, phone numbers, or API keys to redact them instantly. Try dragging on the sample image below right now!
Skip the Browser — Auto-Redact Emails, Phones & API Keys in 1 Click!
With the free SnapBolt Desktop App, press PrintScreen to freeze any window in 0.1s, hit Ctrl+Shift+M to automatically pixelate all emails, phone numbers, and secrets via 100% offline Windows OCR, and press Enter to paste straight into ChatGPT, Slack, or GitHub!
🔒 Why Client-Side Redaction Matters
Many 'free online blur' websites upload your screenshot to a remote cloud server. SnapBolt's web redactor processes pixels strictly inside your local browser Canvas — ideal for customer tickets, API dashboards, and invoices.
🛡️ Irreversible Pixel Destruction
Weak Gaussian blurs can sometimes be reconstructed. Our Mosaic (22px) and Solid Blackout modes overwrite underlying character blocks completely before generating your PNG.
⚡ Desktop Power: Scrolling + GIF + OCR
Need full-page scrolling screenshots, MP4/GIF screen recording, Smart Pixel Ruler, or offline text OCR? Explore the full SnapBolt Windows utility. Learn more →