URL QR Code Generator: Full Link Verification and PNG Download

URL QR Code Generator: Full Link Verification and PNG Download: purpose and instructions

Enter a single complete http:// or https:// public URL, and after checking the complete text, protocol and host, generate a black and white QR Code, preview and download the PNG in the browser itself. Suitable for placing paper notices or documents; no login required, no opening or detection of input links, and clearing after leaving the tool.

How to use

Only links intended to be made public; anyone with access to the image or paper can read the full URL. Pasting a single complete http:// or https:// URL will not automatically fill in the protocol.
Check the complete text of "URL to be encoded", including query parameters and fragments, and compare protocol, domain/host and port. Only leading and trailing ASCII spaces are removed and the prompt is removed. Parameters are not rearranged or the URL is rewritten.
After confirmation, click "Generate QR Code", check the complete URL next to the result, and then download the PNG of the same result. After modifying the input, the old preview and download will become invalid and need to be generated again. When inserting the file, keep the proportions and four white edges, and actually try scanning and printing by yourself.

Frequently asked questions

What URL can I enter?: Processes one fully hosted HTTP(S) URL at a time, up to 1,000 UTF-8 bytes, not counting words; does not support relative URLs, other protocols, account passwords, internal whitespace, control or invisible characters, backslashes, and incomplete percent encoding. If the URL is invalid or exceeds the capacity, the entire URL will be rejected and the URL will not be truncated or shortened.
Will the link be checked for security, visibility, or automatically opened?: The tool only codes locally and does not open, detect or pre-fetch input URLs, nor does it pass to external QR APIs. It does not verify public permissions, destination website security, content or permanent validity; the account check cannot fully identify private tokens, signatures or personal information in paths, queries or fragments. Please confirm by yourself that it is suitable for disclosure.
Will the URL or image be saved?: The input and PNG are only processed in the memory of this page and will not be automatically saved or uploaded, nor will they be placed in the website URL. Drafts will not be restored after clearing, leaving the tool, refreshing or closing; the downloaded PNGs are managed by you, and clearing will not delete the downloaded files.
How big is PNG? Can I add a logo or change the color?: Uses fixed M error correction level, outputs black squares, white opaque background, retains 4 module white edges on each side, and has no logo or color options. Each module adopts an integer number of pixels. The actual square side length is at least 1,024 pixels. It is adjusted according to the content density. Please refer to the actual size marked after generation.
Does downloading PNG mean that all mobile phones and paper books can be scanned?: No guarantee. URL length, QR density, print dimensions, image quality and the scanning device all affect readability. Keep the black-and-white contrast, original proportions and full white border. Test the downloaded PNG on the intended phones and printed samples, checking the complete decoded URL. An on-screen preview or desktop decode does not replace testing the physical output.

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