Everything you need to know about how Blurify works, what it supports, and how your files stay private. Can't find what you're looking for? Read our guides or open an issue on GitHub.
Yes, completely free. No subscription, no paywall, no watermarks, and no sign-up required. Blurify is funded by non-intrusive advertising.
No. Your files never leave your device. Blurify processes everything locally in your browser using the Canvas API, WebAssembly, and the MediaRecorder API. There are no servers receiving, storing, or processing your images, videos, or PDFs. You can verify this yourself by opening your browser's Network tab while using the tool — no upload request will appear.
Images: PNG, JPG/JPEG, WebP, GIF, AVIF, BMP. Videos: MP4, WebM, MOV, OGG, AVI, MKV. Documents: PDF (single and multi-page). Export formats: PNG, JPEG, WebP, MP4, WebM, PDF.
Blur applies a Gaussian blur effect — the content is obscured but a soft impression of the underlying area remains visible. Redact fills the shape with a solid black box, completely hiding the content with no visual trace. For sensitive data like account numbers, passwords, or legal documents, redact is the safer choice. For faces in published photos, blur looks more natural.
Yes, there is no limit. You can draw as many blur or redact shapes as you need. Each shape is listed as a separate layer in the right panel, where you can select, rename, adjust, or delete them individually.
Yes. Blurify supports video files (MP4, WebM, MOV) and lets you draw blur or redact shapes that stay fixed in position throughout the video. For moving subjects, you can use the keyframe system to animate blur shapes across frames so they track a face as it moves.
Keyframes let you set different positions for a blur shape at different points in time within a video. For example, you can place a blur box over a face at 0 seconds, then reposition it at 3 seconds to follow where the face has moved. Blurify smoothly interpolates the position between keyframes. Press K to add a keyframe at the current playhead position for the selected shape.
Yes. You can open single or multi-page PDFs, draw blur or redact shapes on any page, navigate between pages (each page keeps its own shapes), and export the result as a new PDF. The redaction is permanent — the exported PDF is fully rasterized, so underlying text cannot be extracted.
Yes. For videos, the Detect Faces button in the editor runs MediaPipe's face detection model entirely in your browser. It scans the video at 15 frames per second, creates blur shapes for each detected face, and adds keyframes to track their movement. No face data is ever sent to a server.
Because Blurify processes files locally in your browser and never transmits them to a server, there is no transfer of personal data (including photos of individuals) to a third-party processor. This makes Blurify straightforward to use in GDPR-regulated contexts. Blurify does use Google Analytics, AdSense, and Vercel Analytics for basic usage metrics and advertising, which have their own data processing terms.
Yes, Blurify is mobile-responsive. You can upload files, draw blur shapes using touch, and export results on mobile browsers. Video export and PDF export may be slower on mobile hardware due to the processing requirements.
After the initial page load, image and PDF processing work without an internet connection since all the necessary code is cached by your browser. MP4 video export requires downloading the ffmpeg.wasm binary (~31MB) on first use, which needs a network connection. After that, it is cached and works offline.
Only inside the blurred region. The rest of the image is exported at full original resolution with no quality loss. When exporting as PNG, there is zero compression outside the blurred area.
No. When you export from Blurify, the blur is permanently baked into the output file. There are no layers, no editable objects, and no way to recover the original content from the exported image. Your original file is never modified — make sure you share the exported version, not the original.
Blurify works in all modern browsers: Chrome, Firefox, Safari, Edge, and Brave. Some browsers (notably Brave with strict fingerprinting protection) may handle canvas interaction slightly differently — Blurify includes a fallback hit-testing system to ensure shapes remain draggable in those environments.
Images and PDFs: up to 100MB. Videos: up to 2GB. These limits are enforced by the browser's available memory, not by server constraints — very large files may perform slowly depending on your device.
Open your image or video in Blurify, select the Rectangle tool, and draw a box over the license plate. The blur or redact effect is applied immediately in the preview. For videos where the vehicle is moving, use the keyframe system to reposition the blur box at key moments in the footage.