Create QR codes entirely in your browser. Choose templates, customise colours, and export as PNG or SVG.
QR codes encode data into black and white modules. Position markers and timing patterns help scanners orient themselves, while error correction recovers information if the code gets scratched or smudged.
| Level | Recovery | When to use |
|---|---|---|
| L (7%) | Recovers ~7% of damaged modules. | Large posters or indoor signage. |
| M (15%) | Recovers moderate damage. | General purpose marketing material. |
| Q (25%) | Handles heavy wear. | Outdoor displays, packaging. |
| H (30%) | Maximum redundancy. | Codes with logos or high-risk environments. |
These tips keep your QR codes scannable across devices, printing methods, and lighting conditions.
Dark foreground on a light background gives scanners the highest success rate. Avoid gradients that reduce contrast.
Leave at least four modules of whitespace around the code. Cropping or adding graphics too close breaks detection.
Scan the final size on multiple phones. If the code links to a URL, include HTTPS and ensure the destination is mobile friendly.
For Node.js install qrcode; for Python install qrcode and Pillow. Test the exported code with a scanner before distributing it. Error correction does not protect the content from being read.
import QRCode from 'qrcode';
async function createQr(text) {
const svg = await QRCode.toString(text, {
type: 'svg',
errorCorrectionLevel: 'M',
margin: 4,
color: { dark: '#000000', light: '#FFFFFF' }
});
return svg;
}
createQr('https://www.hashytools.com').then(console.log);import qrcode
def create_qr(data: str, path: str = 'qr.png') -> None:
qr = qrcode.QRCode(error_correction=qrcode.constants.ERROR_CORRECT_M, box_size=10, border=4)
qr.add_data(data)
qr.make(fit=True)
img = qr.make_image(fill_color='black', back_color='white')
img.save(path)
create_qr('WIFI:S:MyNetwork;T:WPA;P:SuperSecret;;')You can encode plain text, URLs, Wi-Fi credentials, vCards, email drafts, and SMS messages. The HashyTools templates guide you through each format.
Higher error correction levels (Q or H) let scanners recover data if the code is damaged, but they reduce available capacity. Choose a level based on your deployment environment.
Yes. Maintain strong contrast, keep the quiet zone, and export at a resolution suitable for your print size or choose SVG for crisp scaling.
No. QR codes render entirely in your browser—your text, credentials, or contact details never leave the page.
Scan the code with multiple devices under the same lighting you expect in production. Validate the destination content and confirm the print layout preserves clarity.
Protect text with AES-GCM and PBKDF2 tokens that stay on-device.
Generate MD5, SHA-1, and SHA-256 digests locally with Web Workers.
Convert any text to or from Base64 without leaving your browser.
Decode claims and verify HMAC signatures without network calls.
Validate, format, and diff JSON without network calls.
Format, minify and convert XML to JSON locally.
Experiment with regular expressions and capture groups locally.
Encode components and inspect query parameters locally.
Create collision-resistant UUID v4 identifiers using Web Crypto.
Build strong passwords with custom length, charset, and entropy.
Convert Unix timestamps into local, UTC and ISO dates.
Convert case, slugify, and clean strings on-device.
Switch between HEX, RGB, HSL, and Tailwind palettes instantly.
Generate EAN and Code 128 barcodes and download crisp PNG output.
Look up your public IP using disclosed external services.
Produce paragraphs, lists, and markdown filler text fast.
Compress JPG, PNG, WebP and AVIF images to a target size in your browser. Preview results, process batches and download images individually or as a ZIP.
Convert WebP and AVIF images to JPG or PNG locally. Batch convert supported images, control quality and transparency, preview results and download a ZIP.
Convert JSON and NDJSON to CSV for Excel, or CSV to JSON, locally. Flatten nested objects, choose columns and delimiters, and download UTF-8 results.
Decode Base64 or data URIs to an image preview and download, or encode an image file to Base64. Inspect dimensions and size without uploading your image.
Convert HEIC and HEIF photos to JPG or PNG in your browser. Choose quality, preview converted images and download individual photos or a batch ZIP.
Decode Base64 to PDF locally, preview pages with zoom and navigation, and download the decoded PDF. Supports raw Base64 and application/pdf data URIs.
Run the AES interoperability guide or read how these tools are checked.