二维码生成器

Choose the "URL" option in the left panel, paste your link into the "Data / URL" field, then click the blue "Generate QR" button. The tool renders a live preview and offers size controls — default PNG output is 1024×1024 px, and you can change it up to 3000×3000 px or download an SVG for vector output. Use the "Error correction" dropdown (L, M, Q, H) if you plan to overlay a logo; when ready, click the "Download" button and pick PNG, SVG, or PDF (.png, .svg, .pdf). No signup or watermark is added on download.

Select "Wi‑Fi" in the left menu, enter the SSID (network name), choose encryption type (WPA/WPA2, WEP, or None), and paste the password into the "Password" field; check "Hidden network" if applicable. Click "Generate QR" to create a QR that encodes the standard Wi‑Fi format (WIFI:T:WPA;S:SSID;P:password;;) which most phone cameras and Wi‑Fi scanners recognize. Test on your device before printing — the tool lets you download as PNG (default 1024 px) or SVG; no app download or signup is required. For security, use WPA2/WPA3 on networks rather than leaving them open.

For logo uploads the site accepts PNG (preferred for transparency), JPG/JPEG, WebP, GIF, and SVG up to 5 MB per file when using Chrome or Firefox desktop; Safari on iOS may require converting HEIC to JPG first. Output formats are PNG (.png), scalable SVG (.svg), and printable PDF (.pdf) — PNG max pixel size 3000×3000, SVG is vector so resolution‑independent, and PDF is suitable for print at 300 DPI. If your browser refuses an upload, try desktop Chrome/Firefox; mobile Safari has known memory limits for large image composition.

After generating the QR, click "Add Logo" and upload your image (PNG/JPG/SVG up to 5 MB). Keep the logo area to 20–30% of the QR size and set "Error correction" to H (30%) in the Error correction dropdown so the code can tolerate the occlusion; the tool provides a slider labeled "Logo size" to fine‑tune. Also keep contrast high (dark modules on a light background) and maintain the quiet zone (margin) — use the "Include margin" checkbox if present. Always test with multiple phone cameras before distribution.

Common causes are small printed size, low contrast, large logo covering key modules, or too low error correction. Increase the PNG output size (use 1024 px or higher), switch to high error correction (H), reduce logo size via the "Logo size" slider, and re‑generate; for printing, download SVG or PDF to avoid raster artifacts. If Safari/older browsers produce blurry downloads, re‑try in Chrome/Firefox or use SVG for crispness; verify the quiet zone (at least 4 modules) and avoid complex background images behind the code.

Select the "vCard" option, then fill the form fields such as Full name, Organization, Job title, Phone (mobile/work), Email, Website, and Address; the tool encodes a vCard 3.0 block (BEGIN:VCARD / VERSION:3.0). Click "Generate QR" to preview and then download as PNG, SVG, or PDF; the vCard QR is compatible with most iOS and Android contact import flows. For long biographies use the "Note" field but be aware very large vCard payloads increase QR complexity and may require a larger size or higher error correction.

Yes: QR code capacity depends on mode — roughly up to 4,296 numeric characters, 2,953 bytes in byte mode, and about 2,335 alphanumeric characters; the tool will increase QR version automatically but very long text makes the pattern dense and harder to scan. If your URL or text is very long, use a URL shortener first or export as SVG/PDF and print large; the generator warns visually when the code becomes high‑version. For vCards and Wi‑Fi entries typical lengths are fine, but large attachments or very long notes may exceed practical scanning limits.

No signup is required and downloaded QR files do not include watermarks; you can generate and download PNG, SVG, or PDF directly after clicking "Download". The site runs entirely in your browser to compose the QR and image layers — generation uses HTML5 canvas for PNGs, while SVG/PDF are produced client‑side as well, so data is not uploaded during standard generation. If you use any optional "Share" buttons that email or post the QR, that action will route through our share server and will prompt a consent dialog.

On desktop (Chrome/Firefox) uploads and downloads handle larger files (logo up to 5 MB) and PNG composition up to 3000×3000 px reliably; on iOS Safari, HEIC images must be converted to JPG/PNG first and extremely large logo files can trigger out‑of‑memory errors. Mobile browsers may block automatic downloads unless you accept the permission prompt or use a touch‑triggered "Download" button; Chrome on Android saves straight to the Downloads folder, while iOS Safari opens the PNG in a new tab where you must tap and choose "Save Image." If a download fails, try desktop Chrome or enable pop‑ups/downloads for the site.

Yes — choose SVG or download a high‑resolution PNG at 3000×3000 px, then place that SVG or PNG into your print layout (InDesign, Illustrator, Word). For a 3 cm business card QR, export PNG at 1024–2048 px and maintain at least 300 DPI in your layout; for large posters export SVG or PDF so vector data scales without pixelation. Keep quiet zone margins and contrast intact, and test print at the final size to ensure phones can scan from typical use distances.

The online tool produces ready‑to‑use PNG, SVG, and PDF files quickly with built‑in features like Wi‑Fi and vCard templates, logo overlay, and error‑correction controls; SVG/PDF exports are ideal if you need vector output for print and avoid rasterization work in Photoshop. Photoshop gives pixel‑level control and advanced filters but requires manual QR generation (copy/paste, raster edits) and can accidentally alter module sharpness; Acrobat can embed PDFs but isn't a QR creator. For most users who want immediate QR generation, logo placement, and vector export without desktop software, this web tool is faster and preserves scanability.