Blur & Pixelate Sensitive Info Privately in Browser
Obfuscate passwords, faces, and credentials in screenshots using permanent blur. Processed locally in browser memory for local data privacy.
Drop files here, or choose files
Batch selection supported · Paste from clipboard (Ctrl+V)
Canvas Pixel Mosaic & Gaussian Redaction
Irreversibly obfuscating confidential data on screenshots and documents
Sharing screenshots, legal documents, or identity cards often risks accidentally exposing passwords, API keys, credit card numbers, or personal faces. Reversible black box overlays or semi-transparent layers can sometimes be removed by downstream editors. Zapixal applies true, permanent Gaussian blurring or mosaic pixelation directly onto the canvas raster plane, permanently destroying underlying pixel values.
Local browser-based redaction with zero remote data exposure
Processing unredacted documents or sensitive screenshots on external systems risks exposing credentials across public networks. Zapixal renders the interactive redaction canvas entirely in your local browser tab. The permanent redaction transformation executes inside your browser, meaning unredacted original image files are not uploaded to remote servers.
Step-by-step guide
- Load the screenshot or document image into the privacy editor canvas.
- Select the blur or pixelate tool and drag over sensitive text, faces, or credentials.
- Export the permanently redacted image directly from your browser.
Frequently Asked Questions
Can someone un-blur or reverse pixelated text from an image exported with Zapixal?
No. Zapixal performs permanent raster manipulation. The original RGB pixel values under the redacted selection are overwritten and destroyed.
Why is Gaussian blur or mosaic better than drawing a black rectangle over text?
Both permanently destroy underlying pixels when flattened onto the raster image canvas. Mosaic pixelation visually indicates that information was redacted while preventing data recovery.
Is my unredacted original image sent across a network before I apply the blur?
No. All image loading and redaction rendering occur locally inside your browser memory.
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Why use Zapixal
Fast browser-based tools engineered for privacy, performance, and day-to-day workflow tasks.
Image compression, PDF manipulation, and developer parsing run locally in browser memory via WebAssembly and Web Workers.
No desktop applications or account signups required. Load the tool and process files immediately with full batch capabilities.
From HEIC conversions and PDF merges to JWT inspection and text diffing, access all essential tools in one clean environment.