is the data sent to a server

No. The code is built in your browser and the contents of the fields are neither transmitted nor stored. That matters here more than almost anywhere: QR codes carry Wi-Fi passwords, contact details and payment data, and plenty of online generators upload exactly that and keep it.

will my qr code expire

Not this one: it holds the data itself rather than a link through an intermediary, so it depends on no service staying alive. That is the difference from dynamic codes routed through someone else's domain — those stop working when the service shuts down or starts charging, printed copies included.

what do the error correction levels mean

The share of the code that can be damaged or covered without losing readability: L is about seven percent, M fifteen, Q twenty-five, H thirty. A higher level packs the same data into a denser pattern. H is the choice for printing on packaging and whenever a logo sits in the middle.

why is my qr code not scanning

Usually one of three things: too little contrast between the modules and the background, no quiet margin around the code, or a logo large enough to eat the error-correction budget. The check section on the page measures all three and names the culprit, using the same contrast formula as WCAG.

how do i make a wifi qr code

Pick the Wi-Fi type and fill in the network name, the password and the encryption type — whoever scans it joins without typing anything. Keep in mind the password sits in the code as plain text: a printed code on a wall shows that password to anyone who photographs it.

QR code generator

Creates QR codes for links, Wi-Fi, contacts and Russian GOST payments. Everything is computed in the browser — no data leaves your device.

A static code, forever · free · no ads · no server

01Generator 02Verify 03About QR 04Questions 05Related

Code generator

Data, styling and correction level — the preview updates on every keystroke

Data

Quick format

Link (URL)

Styling

Frame with a caption

The frame keeps the four-module quiet zone for you — the very margin whose absence is the most common reason a printed code will not scan.

Code colour

Logo

Error correction

No logo — the whole correction budget is free

Export

Size

the background is not filled — the code sits on any surface In the PDF the code is vector and the caption is a 300 dpi image: base PDF fonts carry no Cyrillic, and this is the only way not to lose Russian text.

Payload

https://bringer.ru

Version 225 modules

A static code, forever · free · no ads · no server

The code scans perfectlycontrast 18.5:1

Contrast is fine, the logo fits the budget, the quiet zone is wide enough.

Format deep dives

three code types explained in detail, with checks this page does not run

GOST payment

The payment string

The whole content of the code is one string with fields separated by a vertical bar. Here it is broken apart field by field: what goes into the code, and where the mistake is.

Wi-Fi

The connection string

Google invented the format; it never became an official standard but is supported everywhere. Here you can see what the string is built from and which characters had to be escaped — escaping is where most home-made generators break.

Business card

What the card weighs

The cost of every field in bytes — measured, not derived from length: a field also pays for its line name, breaks and escaping. From here it is clear what to drop to make the code sparser.

Verification, print size and batch export

Make sure the code scans, pick a print size and build a batch of codes at once

Camera check

Scan the code you have just made with your own camera — before sending it to print. The video is processed in the tab and never uploaded.

Print size

Scanning distance, cm

Code size, cm

3.0 см

minimum code size for a distance of 30 cm

30 см

maximum distance for a 3 cm code

The 10:1 rule — a code reads reliably from about ten times its own width. module 0.91 mm at the current version

Batch generation

One code per line. CSV works too: name,data — then the name becomes the file name. The current styling applies to every code.

List of codes

3 · limit 500

About QR codes — what is worth knowing

A QR code (Quick Response) is a two-dimensional barcode invented in 1994 by the Japanese company Denso Wave to label car parts.

Unlike a regular barcode it encodes data in two dimensions, holds up to ~3 KB and reads from any angle thanks to the three orientation squares in its corners.

How a code is built

Structure

3 eyes · timing · data

The three large squares in the corners are position markers: the scanner uses them to find the code and work out its rotation. Timing lines between them define the module grid. The rest of the field is the data itself, interleaved with redundancy.

Error correction

Reliability

H = 30% may be covered

Reed–Solomon coding adds redundant bytes: even if part of the symbol is smudged, covered by a logo or torn, the data can be restored. Four levels, from 7% (L) to 30% (H). The price of reliability is a denser code.

Versions and capacity

Data

v1 = 21×21 · v40 = 177×177

There are forty versions: from 21×21 modules (about 25 characters) up to 177×177 (~4300 characters). The longer the payload, the higher the version and the smaller the modules at the same physical size — so print it larger.

GOST payments

Russia

ST00012|Name=…|BIC=…

Russian payment QR codes follow GOST R 56042-2014. It is a plain text string of bank details separated by “|”. Such codes are printed on utility bills, tax notices and traffic fines — the banking app fills in the payment form itself.

Why codes can be coloured

Design

contrast beats colour

A scanner tells light from dark rather than reading hues, so modules can be any colour as long as the contrast with the background holds. Inversion — light modules on a dark background — is riskier: some cameras look specifically for dark modules.

Privacy

Security

everything in the browser

This generator sends nothing to a server: the module matrix is computed in the tab and the image is drawn on a canvas. For Wi-Fi passwords, contacts and bank details that matters — they never reach someone else's logs.

Frequently asked questions

Paste the address and the code appears at once, ready to download as an image or print. Besides links there are nine more data types: plain text, Wi-Fi credentials, a contact card, a bank payment, email, phone, SMS, a geo point and a calendar event, selected with the chips above the field.

Updated 8 August 2026

QR code generator

Code generator

The payment string

The connection string

What the card weighs

Verification, print size and batch export

About QR codes — what is worth knowing

How a code is built

Error correction

Versions and capacity

GOST payments

Why codes can be coloured

Privacy

Frequently asked questions

how to create a qr code from a link

is the data sent to a server

will my qr code expire

what do the error correction levels mean

why is my qr code not scanning

how do i make a wifi qr code

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