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Cryptographic QR Signing lets you attach a digital signature to any QR code you create. The signature is produced on your Mac using a P-256 ECDSA private key stored in your macOS Keychain. The public key and signature are embedded in the QR code URL. Anyone who scans the code can visit qreagle.com/api/verify to confirm that the content has not been altered since you signed it.

Switch to the Style tab in QREagleStudio and look for the Signature section at the top. Toggle "Sign this QR code" on. On first use, the app generates your key pair automatically. Optionally enter a display name that will appear on the verification page. Export your QR code as usual — the signature is embedded in the content.

Your private key is generated once and stored exclusively in your macOS Keychain, protected by AES-256 encryption and sandboxed to QREagleStudio's bundle identifier. It never leaves your device and is never transmitted to any server — including ours. Only the public key (which by design is meant to be shared) is embedded in the QR code URL.

When a scanner visits qreagle.com/api/verify, they see: ✅ "QR Signature Verified" (if the content and signature match) or ❌ "Signature Invalid" (if the content was tampered with). The page also shows the content type, the original QR data, your optional signer name, and a short key fingerprint to help identify your key.

Verification proves that the QR content has not been changed since you signed it, and that whoever signed it held the private key corresponding to the displayed public key. It does NOT prove your real-world identity — the signer name is self-declared and is not verified by a certificate authority. Think of it as a tamper-evident seal, not a notarised document.

No. The verification endpoint at qreagle.com/api/verify is completely stateless. All four URL parameters (content, signature, public key, signer name) are processed in memory for the duration of the request and nothing is written to any database. Only the standard web server access log entry is created (deleted after 30 days). See our Privacy Policy §5f for full details.

Yes. Signing works with any QR content type — URLs, vCards, Wi-Fi, plain text, email, payment addresses, Smart Cards, and more. The signature covers the exact string that is encoded into the QR code.

Your signing key is stored in the macOS Keychain. If you restore your Keychain (e.g. via iCloud Keychain or a Mac migration), the key is restored automatically. If you set up a fresh Mac without Keychain transfer, a new key pair will be generated — QR codes signed with the old key will still verify correctly, but the key fingerprint will differ from any new signed codes.

Cryptographic QR Signing is included with a QREagleStudio Premium subscription or lifetime licence. The verification page at qreagle.com/api/verify is free to use for anyone, with no account required.

Dynamic QR codes contain a short link (e.g. qreagle.com/go/abc123) instead of a fixed URL. You can update the destination at any time from the QREagleStudio app — without reprinting or redistributing your QR code. A scan counter tracks how many times each code has been scanned.

In QREagleStudio, select the "Dynamic URL" type under Utilities. Enter a destination URL and an optional label. The app registers the short link with qreagle.com and generates a QR code pointing to your personalised /go/ short URL. Export and use the QR code as usual.

Open the QREagleStudio app, go to the Dynamic QR tab, and tap the link you want to change. Tap "Edit Destination", enter the new URL, and save. The change takes effect immediately — all future scans of the same printed QR code will redirect to the new destination. No reprinting needed.

Scan counts are shown in the Dynamic QR tab of the QREagleStudio app. Each redirect increments the counter by one. Note: only the total count is stored — no personal information about who scanned is collected.

Dynamic QR creation requires a QREagleStudio Premium subscription. After purchasing, your personal API key is provisioned automatically — no manual setup required.

Yes. Toggle the "Active" switch for any link in the Dynamic QR tab of the app. When a link is inactive, scanning the QR code shows a "Link not found" page instead of redirecting. You can reactivate it at any time.

Deleting a link permanently removes the slug, destination, and scan counter from our servers. The deletion is immediate and irreversible. Scanning the old QR code afterwards will show a "Link not found" page.

We only store an aggregate integer counter — we do not log IP addresses, device information, or any personal data of the people who scan your QR codes. See our Privacy Policy for full details.

QREagleStudio has two panels: the left sidebar for picking a QR code type and styling it, and the right preview area that updates live. Pick a category and type, fill in the fields (e.g. a URL or phone number), then export via the Export button at the top.

Switch to the Style tab in the left sidebar. There you can change colours, pixel shapes, eye shapes, apply one of 148 presets, add gradient fills, and more — all with a live preview.

Press ⌘⇧B, or go to Tools → Bulk Generate from CSV… in the menu bar.

165 types across 8 categories: Social Media (YouTube, Instagram, LinkedIn, TikTok, Facebook, X/Twitter, and 14 more), Communication (Email, Phone, SMS, WhatsApp, Telegram, Zoom, and more), Payments (Bitcoin, Ethereum, PayPal, SEPA, and more), Utilities (URL, Wi-Fi, vCard, App Store…), Location (GPS, Google Maps, Apple Maps), Events (iCal), Smart / Interactive Cards (85 types), and Other (ISBN, Google Review…).

Yes. Select Utilities → Wi-Fi Network, enter your SSID, password, and security type. Anyone scanning the code can join your network instantly — no typing required.

Yes. Select Communication → vCard Contact and fill in the name, phone, email, address, and other fields. The recipient's phone will offer to save the contact directly.

Yes. For types like YouTube, Instagram, Twitter/X, WhatsApp, and others, the platform logo is embedded automatically when you select that type. You can still replace it with your own image or an SF Symbol.

168+ presets — from Classic and Nebula to Sakura and various Circular variants. Tap any preset card to apply a complete set of colours, pixel shapes, and eye shapes instantly.

Data pixels are the individual square modules that make up a QR code. In QREagleStudio you can change their shape: Square, Circle, Rounded, Star, Flower, Sharp, Pointy, Squircle, and more. Use the Inset and Corner sliders to fine-tune.

Yes. Enable the Gradient Fill toggle in the Style tab, then pick Linear or Radial, and choose start and end colours. The gradient is applied across the data pixels.

Error correction lets a QR code remain scannable even if part of it is obscured or damaged. Low (7%) gives smaller codes; High (30%) is most resilient. Use Q or H (25–30%) whenever you add a logo, since the logo covers part of the code.

Yes. Some presets and the dedicated Round Presets section produce a circular QR code where the data is clipped to a circle and the frame adapts accordingly.

Yes. In the Style tab, open Logo / Icon and click Choose Logo… to pick any PNG, JPEG, GIF, or SVG from your Mac. The logo is centred on the QR code.

Keep logos at 25–30% of the QR code area and set Error Correction to Q or H (25–30%). The Size slider in the Logo section controls coverage.

It adds a white background behind the logo to visually separate it from the QR data — especially useful with dark-coloured QR codes.

It's a built-in browser for Apple's vector icon library (1,000+ icons) that lets you embed any symbol as the QR logo — no image file needed. Access it via the SF Symbol button in the Logo section.

Click the SF Symbol button in the Style tab → Logo section. Browse by category or search by name (e.g. 'wifi', 'cart', 'envelope'). Pick a foreground colour and background style (Square, Circle, or None), then click Apply.

SF Symbols are vector-based, so they scale perfectly to any output resolution — including large print sizes — without any pixelation.

Yes. Enable the Text Label toggle in the Style tab. Enter up to two lines of text, choose above or below position, set alignment, font size (14–80 pt), colour, and bold. The V. Offset slider nudges the label up or down for precise spacing.

Enable the Frame / Border toggle. Choose a solid colour for the frame background, set padding between the QR edge and the border, and adjust corner radius. When Circular QR is enabled, the frame automatically adapts to an oval.

A two-line label with your brand name on Line 1 and your URL on Line 2, both centred below the code, works very well for business cards, flyers, and posters.

Open Tools → Bulk Generate from CSV… (⌘⇧B). Set your desired style in the main window first, then in the bulk window click Import CSV…, choose an output folder, set the output size (200–1200 px), and click Generate All. Each row becomes a separate PNG.

One line per QR code — just the raw content. No header row needed. Examples: a URL, a phone number, a Wi-Fi string, plain text. Files are saved as 001.png, 002.png, 003.png… matching row order.

Everything active in the main window: pixel/eye/pupil shapes, fill colour or gradient, logo (with mask and corner radius), circular clipping, frame, text labels (both lines, font, colour, position, offset), and error correction level.

Not in a single run — but you can run bulk generation multiple times, once per style, using different CSV files or output folders.

Everything: the QR type, form fields, colours, shapes, logo scale, both label lines and their vertical offset, and the frame. Configurations are stored locally on your Mac in UserDefaults and persist between launches.

Click the Library button (book icon) in the top toolbar. Press Save Current, give it a name, and it's stored. Tap any saved item to restore it instantly. You can also delete items by swiping or clicking Delete.

PNG (raster, up to 1200 px), SVG (vector, infinitely scalable), and PDF (vector, ideal for professional print). Right-click the preview to also copy to clipboard.

Use 600–1200 px for professional printing. The Output → Resolution slider in the Style tab controls PNG export size. For print, the physical QR code should be at least 2 cm × 2 cm.

Yes. Right-click the QR preview and choose Copy to Clipboard to paste the image directly into other apps such as Keynote, Pages, or Figma.

Always test with multiple apps before printing. Use high contrast between foreground and background. Keep logos at 25–30% and set error correction to H (30%). Dark foreground on light background is most reliable.

Long URLs produce dense, complex QR codes. Use a URL shortener (e.g. bit.ly) to reduce complexity and improve scan speed.

Apply a style preset in the main window before opening the bulk generator — that way all batch codes share the same branded look with zero extra effort.