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CrunchyQR

QR Code Studio — Web Edition

📱
Generate, customize & read QR codes. Fully featured, 100% client-side — your data never leaves your browser.
✦ Ready to create a QR code? Use the tool below — or read the guide first ↓
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QR Code Studio
QR Code Preview
■
Configure & click Generate
🔒 Your Data Never Leaves Your Browser.
CrunchyQR generates and decodes every QR code entirely inside your browser. Your Wi-Fi passwords, contact details, URLs, and text are never sent to any server — not even as metadata. There are no accounts, no cloud storage, no tracking of any kind. Close the tab and everything is instantly gone. This is not marketing copy: it is a technical reality.  |  Terms of Service
How to Generate & Read QR Codes

1. Generate

Choose a QR type — Text, URL, Wi-Fi, vCard & more — fill in the fields, then click Generate QR Code. The QR is rendered instantly in your browser using the qrcode library. Nothing is sent anywhere.

2. Customize

Pick custom foreground & background colors, set the output size up to 1024 px, adjust the quiet zone margin, and overlay your own logo image at the center. Use ECL H when adding a logo.

3. Error Correction

Choose from L, M, Q, or H error-correction levels. Higher levels let scanners recover data even if part of the QR is damaged or covered by a logo — at the cost of a denser, more complex code.

4. Wi-Fi QR

Share your Wi-Fi credentials without typing. Enter the SSID, password, and security type. Anyone who scans the code on Android or iOS will be prompted to join your network instantly. No apps needed.

5. Reader

Switch to the Read tab to decode QR codes. Point your webcam at a code for live scanning, or upload an image file. Decoding uses jsQR — 100% local, no server, no upload.

6. Batch Mode

The Batch tab lets you paste a list of inputs — one per line — and generate all QR codes at once. Download the entire set as a ZIP file containing individual PNG images, named by content.

100% Client-Side

CrunchyQR runs entirely in your browser. Your Wi-Fi passwords, contact info, and URLs never leave your device. No servers, no logs, no tracking. Close the tab — history is gone by design.

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🔒 Why a Client-Side QR Code Generator?

🕵️ Sensitive Data Stays Private

Wi-Fi passwords, contact details, and private URLs embedded in your QR codes are never transmitted to any server. Server-based generators receive your data to process it — CrunchyQR never does.

⚡ Instant Generation

No upload round-trip. No server queue. QR codes render the moment you click Generate using a local JavaScript library. Even batch jobs of 100+ codes complete in seconds on any modern device.

🌐 Works Offline

Once the page loads, CrunchyQR works without any internet connection. Generate QR codes for menus, signs, or events even without Wi-Fi. Perfect for trade shows, pop-ups, or remote locations.

♾️ No Limits

Server-based tools limit free users to a handful of QR codes per day. CrunchyQR has no such restriction — generate and batch-export hundreds of QR codes in a single session, completely free.

💸 Always Free

No subscription. No watermarks. No "upgrade for custom colors." CrunchyQR is permanently and unconditionally free for personal use, supported only by non-intrusive display advertising.

🔓 Open Tech Stack

Built on qrcode.js, jsQR, and JSZip — all open-source libraries running locally. No proprietary API, no SDK lock-in. Every QR code is generated and decoded transparently in your browser.

💡 Tips for Better QR Codes
1
Always use ECL H when adding a logo — High error correction (30%) ensures the QR remains scannable even with a logo covering the center. Lower ECL levels with a logo will produce codes that fail to scan.
2
Keep URLs short for cleaner QR codes — longer data means more modules (dots), producing a denser QR that is harder to scan at small sizes. Use a URL shortener before encoding long links.
3
Maintain high contrast between foreground and background — scanners rely on contrast to read modules. Black on white is optimal. Avoid light-on-light or similarly-valued color combinations, which cause scan failures.
4
Download at 512px or higher for print — for business cards, posters, or signage, set the size to at least 512px before downloading. QR codes printed below 2cm square often fail to scan reliably.
5
Use Batch Mode for menus, catalogs, or event sheets — paste a list of URLs or text entries one per line, set your size and ECL, then download the whole set as a ZIP of individually named PNG files.
6
Test every QR code before printing or distributing — use the Reader tab or your phone's camera to verify the code scans correctly and links to the right destination before committing to a print run.
❓ Frequently Asked Questions
Yes — completely free with no premium tier, no watermarks, no daily limits, and no sign-up required. CrunchyQR is supported by non-intrusive display advertising.
Never. All QR generation and decoding happens locally using JavaScript libraries running in your browser. Your Wi-Fi passwords, contact info, URLs, and any other data you encode are never transmitted anywhere.
CrunchyQR supports: Plain Text, URL/Link, Wi-Fi Credentials (WPA/WEP/Open), Email (with subject and body), Phone Number, SMS (with message), vCard Contact (name, org, phone, email, website), and Geographic Location (lat/lon).
Yes. Upload any image as a logo overlay in the Customize section. Always set Error Correction to H (High) when using a logo — this ensures the QR remains scannable even with part of it covered by the logo image.
Switch to the Batch tab, paste your entries one per line (URLs, text, phone numbers, etc.), choose your size and error correction level, and click Generate All. Download the entire set as a single ZIP file with individually named PNG images.
Switch to the Read tab. Click Start Webcam to scan live via your camera, or click Upload Image File to decode a QR code from an existing image. Decoding is powered by jsQR running entirely locally — no image is uploaded anywhere.
Individual QR codes can be downloaded as PNG (raster, ideal for digital use) or SVG (vector, ideal for print and scaling). Batch exports produce a ZIP of PNG files. SVG is recommended for large-format printing.
Yes. Once the page has fully loaded, all QR generation, decoding, and batch export features work without an internet connection. Only the visitor counter and ad units require connectivity.
L (Low, 7%) — smallest code, suitable for clean digital display. M (Medium, 15%) — good balance for general use. Q (Quartile, 25%) — better recovery for slightly damaged codes. H (High, 30%) — required when overlaying a logo; maximum recovery capacity.
CrunchyQR works on any modern browser: Chrome 100+, Firefox 100+, Safari 15+, Edge 100+, and Brave. Webcam scanning requires camera permissions to be granted. Internet Explorer is not supported.
⚖️ CrunchyQR vs. Other QR Code Generators
Feature CrunchyQR Typical Online Generators
Data Sent to Server? ✔ Never — 100% local ✘ Yes — your data is transmitted
Works Offline? ✔ Yes, once page is loaded ✘ Requires active internet
Daily / Monthly Limits? ✔ No limits, ever ✘ Often capped on free plans
Account Required? ✔ Never ✘ Required for advanced features
Watermark-Free? ✔ Always — no watermarks ✘ Watermarked on free tier
Logo Overlay? ✔ Built-in, any image ✘ Often a paid feature
Batch Export to ZIP? ✔ Unlimited batch + ZIP ✘ Rarely free
Built-in QR Reader? ✔ Webcam + image upload ✘ Usually a separate tool
⚠ Features of other tools vary. When using any online QR generator for Wi-Fi credentials or contact information, always verify whether your data is transmitted to their servers.
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⚠️  Terms of Service — CrunchyQR Web

Effective: January 1, 2026

1. Acceptance. By using CrunchyQR Web, you agree to these Terms of Service.

2. Free Service. CrunchyQR Web is provided free of charge for personal use.

3. Client-Side Processing. The Service operates entirely within your web browser. No QR data is transmitted to or stored on any server.

4. User Responsibility. You are solely responsible for the QR codes you generate and how you use them.

5. Prohibited Uses. You may not use this Service to generate QR codes for malicious, fraudulent, or illegal purposes.

6. Disclaimer of Warranties. The Service is provided "AS IS" without any warranty of any kind.

7. Limitation of Liability. CrunchyQR's total liability shall not exceed $0.00.

8. Governing Law. These Terms are governed by the laws of the State of Texas.