A browser-based bulk QR code generator for Mac lets you produce up to 20 separate PNG QR codes from one pasted list, without installing an application or uploading your URLs. The Bulk QR Code Generator runs entirely inside a Safari, Chrome, or Firefox tab on macOS, encoding every symbol client-side through the qrcode 1.5.4 library that the project's single QR Code Generator already uses. You paste one text or URL per line, choose a pixel size (128, 256, or 512) and an error-correction level (L, M, Q, or H), and the page returns up to 20 unique PNG previews with individual download links. The input parser trims surrounding whitespace, drops blank lines, and collapses exact duplicate lines so the batch never contains the same symbol twice. Nothing leaves the tab: there is no upload step, no tracking, and no server-side rendering. For Mac users who do not want to install a dedicated utility, this matches the same local workflow as the single-image generator but produces a small batch that can be verified on a phone before publishing.
A Browser-Only Path to Bulk QR Codes on Mac
Most macOS users already keep Safari, Chrome, or Firefox open all day, so a browser-only workflow removes the friction of downloading a .dmg, granting accessibility permissions, or trusting a sandboxed utility with sensitive URLs. The generator opens at its dedicated page, reads the input you paste, and writes PNG data URLs straight into the current tab using the same qrcode 1.5.4 encoder that powers the project's single-image QR Code Generator. There is no separate CLI install, no Node.js setup, and no second QR implementation kept in product code, which matters because two encoders can drift in subtle ways (different masks, different segment encodings) and a single batch that mixes them risks inconsistent scan behavior across devices.
The batch is bounded to 20 unique values and 2,000 characters per line on purpose. Those limits keep the operation quick on a regular MacBook Air, cap memory for the layout work, and prevent accidental multi-download volume on phones used to verify the symbols. The page does not maintain a ZIP step because the project intentionally adds no archive dependency; each PNG has its own explicit download link instead.
The Three Controls: Input, Size, and Error Correction
The generator exposes only three controls plus the paste area: the input list, a PNG canvas size selector, and an error-correction selector. Everything else (margin width, library, encoding segments) is fixed by the implementation so that two batches run under identical conditions.
When you paste, the parser trims surrounding whitespace, removes empty lines, and deduplicates exact repeated lines while preserving first-seen order. A batch of 25 lines with 5 duplicates therefore renders 20 previews, not 25. Lines are also capped at 2,000 JavaScript characters each; longer text is rejected before encoding so the page does not silently truncate a URL or contact payload.
The PNG canvas selector offers 128, 256, or 512 pixels. Pixel dimensions affect how the symbol looks when it is displayed or printed larger, but they do not change the data capacity of the QR symbol itself; doubling the pixel count roughly quadruples the file size, not the payload room. For labels and small stickers, 128 pixels is usually enough. For posters, slides, or retina print, 256 or 512 reads cleaner.
Error correction uses the four DENSO WAVE levels that every QR encoder supports:
| Level | Approximate codeword restoration | Trade-off |
|---|---|---|
| L | ~7% of codewords | Densest symbol, smallest footprint, weakest damage tolerance |
| M | ~15% of codewords | Balanced default for ordinary display conditions |
| Q | ~25% of codewords | Good for packaging, outdoor labels, mild surface wear |
| H | ~30% of codewords | Most tolerant, but forces a denser module grid and a larger symbol |
The figures above are the approximate restoration rates published by DENSO WAVE, the organization that invented the QR Code. A higher level is not automatically better: it increases redundancy, which can force a denser module grid that older or low-resolution scanners struggle with. For most Mac-side batches destined for clean screens or undamaged print, level M is the practical default.
Generate a Batch of QR Codes on Your Mac
- Open the Bulk QR Code Generator in Safari, Chrome, or Firefox on your Mac.
- Paste one text or URL per line into the input area, with no more than 20 unique lines.
- Choose a PNG canvas size (128, 256, or 512 pixels) and an error-correction level (L, M, Q, or H).
- Click Generate QR codes and wait for the previews to render.
- Scan each preview with the iPhone or Android camera your audience will actually use, and check the decoded payload character for character.
- Download the verified PNGs one at a time from each preview's download link, and preserve a clear quiet zone around every image when you place it in a layout.
If this is your first time running the generator, the beginner walkthrough at Bulk QR Code Generator for Beginners: First Steps covers the same flow with extra context and a short worked list.
Filenames, Quiet Zones, and the No-ZIP Decision
Every preview gets its own deterministic filename so the batch stays organized on disk. The name begins with a two-digit batch position (01 through 20) and a short ASCII stem derived from the content. A URL such as https://example.com becomes 01-example-com.png. Lines that contain no ASCII letters or numbers fall back to the stem qr-code, so a line of pure emoji still produces a readable filename. Filenames are convenience labels only; they do not change what is encoded inside the symbol.
The page does not bundle files into a single ZIP archive because the project deliberately adds no archive dependency for this batch. Each preview exposes its own download link, and the generator never triggers 20 automatic downloads. This avoids surprise multi-download dialogs on macOS, where Safari in particular may prompt for permission to download multiple files at once. Instead, you click each preview you want to keep, and the browser saves the corresponding PNG with the predetermined filename.
Quiet zones are the blank margins that surround the finder patterns in every QR symbol. The generator writes a margin of 2 modules around each image by default, which is the library's standard, and you should not crop, recolor, stretch, or cover the finder patterns after download. A scannable symbol needs breathing room on every side.
Verify Every Symbol Before Printing or Publishing
A rendered PNG is not proof that every scanner will read the intended content. Long UTF-8 text, emojis, print size, contrast, camera focus, display glare, physical damage to the label, and reader-specific behavior all affect whether a decoded string matches what you pasted. The encoder used here notes that full ECI support is not implemented, which can affect how some payloads are interpreted across different scanner apps.
Always scan every PNG with the target device and application before publishing, printing, labeling inventory, distributing event material, or replacing an existing code. Check the decoded payload character for character. If a single character is off, the encoded value is wrong and the symbol should not be used as-is. Do not use an unchecked QR Code for payments, authentication secrets, safety instructions, or irreversible actions; the verification step exists precisely to prevent those failures.
If one payload exceeds QR capacity, the batch shows an error instead of presenting a partial set as complete. Changing an input line or an option invalidates the previous batch, and an asynchronous job identifier prevents an older generation result from overwriting newer settings, so the preview grid always reflects your latest choices. All payloads and PNG data URLs remain in the current tab. Nothing is uploaded, shortened, tracked, or recorded. The same Mac, the same tab, the same list — and once you close the tab, the in-memory encoding objects go with it.
Related reading: How to Check Bulk URL Generator Results Before Export.