QR Code Generator

Convert URLs or text into scannable QR code images.

Enter text and click Generate.

๐Ÿ“– How to Use

1
Enter Text or URL

Type the URL or text you want to convert into a QR code.

2
Generate QR Code

Click ๐Ÿ“ฑ Generate QR Code to instantly create the QR code image.

3
Scan and Download

Use your phone camera to scan the QR code, or click the download link to save the PNG image.

๐Ÿ’ก Tip: QR codes work reliably even with long URLs. Generated codes are permanent and never expire.

About the QR Code Generator

A QR (Quick Response) code is a two-dimensional barcode: a square matrix of black and white modules a phone camera decodes in either orientation. A 1D barcode stores data only along its width, but a QR uses both axes, so a small square can hold a full URL, a vCard, or Wi-Fi credentials and still scan reliably. This tool turns any text or URL into such a matrix and renders it as a PNG you can save or embed.

How it works

Every QR carries a version from 1 to 40 that fixes the matrix size. Version 1 is 21×21 modules, each step adds 4 per side, so version 40 is 177×177. The encoder picks the smallest version that fits the data at the chosen error-correction level. There are four, defined by their Reed-Solomon recovery: L recovers ~7% of damaged modules, M ~15%, Q ~25%, and H ~30%. Higher recovery eats capacity but tolerates smudging, partial occlusion, or a center logo.

Capacity also depends on the encoding mode — numeric is densest, then alphanumeric, then byte. At version 40 with level L a code holds up to 7,089 numeric digits, 4,296 alphanumeric characters, or 2,953 bytes. Finally a mask pattern is applied: the encoder tries several masks and keeps the one whose black/white distribution is most balanced, so readers can separate data modules from the finder and timing patterns in the corners.

Common use cases

  • Linking a poster or business card to a site without typing a URL
  • Sharing Wi-Fi credentials guests scan to join instantly
  • Encoding a vCard so a phone imports the contact directly
  • Attaching a stable link to a product label or menu

Worked example

Generate a QR for the URL https://example.com. The encoder:

input:  https://example.com   (24 bytes, byte mode)
level:  M  (~15% recovery)
picks:  version 1, 21x21 modules
applies: best mask of the 8 candidates
output: scannable PNG

The short URL fits in version 1, so the code stays small and scans at low resolution; a longer URL forces a larger, denser matrix.

Frequently asked questions

What is a QR code?

A QR (Quick Response) code is a two-dimensional matrix of black and white modules. A QR stores data in both dimensions, unlike a 1D barcode, so a small square can hold a URL, contact card, or Wi-Fi credentials and still scan from a phone camera.

What do QR versions 1 to 40 mean?

The version sets the matrix size. Version 1 is 21×21 modules and each version adds 4 per side, up to version 40 at 177×177. The encoder picks the smallest version that fits the input plus the chosen error-correction level.

What are the error-correction levels L, M, Q, and H?

They are the four Reed-Solomon recovery levels: L recovers ~7% of damaged modules, M ~15%, Q ~25%, and H ~30%. Higher levels survive more smudging or occlusion but reduce capacity, suiting rough prints or center logos.

Is there a maximum amount of data a QR code can hold?

Yes, depending on content type and error correction. At version 40 with level L, a QR holds up to 7,089 numeric digits, 4,296 alphanumeric characters, or 2,953 bytes. Keep URLs short so the code stays scannable at a distance.

Do the generated codes expire or need a server?

No. The matrix is computed locally from your text, so the code is permanent and works offline. Only dynamic QR services that redirect through a short link need a server.

QR ์ฝ”๋“œ ์ƒ์„ฑ๊ธฐ๋ž€?

QR(Quick Response) ์ฝ”๋“œ๋Š” 2์ฐจ์› ๋ฐ”์ฝ”๋“œ์ž…๋‹ˆ๋‹ค. ํ‘๋ฐฑ ๋ชจ๋“ˆ๋กœ ์ด๋ฃจ์–ด์ง„ ์ •์‚ฌ๊ฐํ˜• ํ–‰๋ ฌ์ด๋ฉฐ, ํœด๋Œ€ํฐ ์นด๋ฉ”๋ผ๊ฐ€ ์–ด๋А ๋ฐฉํ–ฅ์—์„œ๋“  ๋””์ฝ”๋”ฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. 1์ฐจ์› ๋ฐ”์ฝ”๋“œ๊ฐ€ ๊ฐ€๋กœ ๋ฐฉํ–ฅ์œผ๋กœ๋งŒ ๋ฐ์ดํ„ฐ๋ฅผ ์ €์žฅํ•˜๋Š” ๋ฐ˜๋ฉด, QR์€ ๋‘ ์ถ•์„ ๋ชจ๋‘ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค. ๊ทธ๋ž˜์„œ ์ž‘์€ ์ •์‚ฌ๊ฐํ˜• ํ•˜๋‚˜๊ฐ€ ์ „์ฒด URL, vCard, ๋˜๋Š” Wi-Fi ์ž๊ฒฉ์ฆ๋ช…์„ ๋‹ด์œผ๋ฉด์„œ๋„ ์•ˆ์ •์ ์œผ๋กœ ์Šค์บ”๋ฉ๋‹ˆ๋‹ค. ์ด ๋„๊ตฌ๋Š” ์ž…๋ ฅํ•œ ํ…์ŠคํŠธ๋‚˜ URL์„ ์ด๋Ÿฐ ํ–‰๋ ฌ๋กœ ๋งŒ๋“ค์–ด ์ €์žฅยท์ธ์‡„ยท์‚ฝ์ž…ํ•  ์ˆ˜ ์žˆ๋Š” PNG๋กœ ๋ Œ๋”๋งํ•ฉ๋‹ˆ๋‹ค.

์ž‘๋™ ๋ฐฉ์‹

๋ชจ๋“  QR์€ 1๋ถ€ํ„ฐ 40๊นŒ์ง€์˜ ๋ฒ„์ „์„ ๊ฐ€์ง€๋ฉฐ, ์ด๊ฒŒ ํ–‰๋ ฌ ํฌ๊ธฐ๋ฅผ ๊ฒฐ์ •ํ•ฉ๋‹ˆ๋‹ค. ๋ฒ„์ „ 1์€ 21×21 ๋ชจ๋“ˆ์ด๊ณ , ํ•œ ๋‹จ๊ณ„๋งˆ๋‹ค ํ•œ ๋ณ€๋‹น ๋ชจ๋“ˆ์ด 4๊ฐœ์”ฉ ๋Š˜์–ด ๋ฒ„์ „ 40์€ 177×177์ด ๋ฉ๋‹ˆ๋‹ค. ์ธ์ฝ”๋”๋Š” ์„ ํƒํ•œ ์˜ค๋ฅ˜ ์ •์ • ๋ ˆ๋ฒจ์—์„œ ๋ฐ์ดํ„ฐ๋ฅผ ๋‹ด์„ ์ˆ˜ ์žˆ๋Š” ๊ฐ€์žฅ ์ž‘์€ ๋ฒ„์ „์„ ๊ณ ๋ฆ…๋‹ˆ๋‹ค. ๋ ˆ๋ฒจ์€ ์ ์šฉ๋˜๋Š” ๋ฆฌ๋“œ-์†”๋กœ๋ชฌ(Reed-Solomon) ๋ณต๊ตฌ์— ๋”ฐ๋ผ ๋„ค ๊ฐ€์ง€์ž…๋‹ˆ๋‹ค: L์€ ์†์ƒ ๋ชจ๋“ˆ์˜ ์•ฝ 7%, M์€ ์•ฝ 15%, Q๋Š” ์•ฝ 25%, H๋Š” ์•ฝ 30%๋ฅผ ๋ณต๊ตฌํ•ฉ๋‹ˆ๋‹ค. ๋ณต๊ตฌ์œจ์ด ๋†’์œผ๋ฉด ์šฉ๋Ÿ‰์€ ์ค„์–ด๋“ค์ง€๋งŒ ๋”๋Ÿฌ์›€์ด๋‚˜ ๋ถ€๋ถ„ ๊ฐ€๋ฆผ, ๊ฐ€์šด๋ฐ ๋กœ๊ณ  ์‚ฝ์ž…์„ ๊ฒฌ๋”ฅ๋‹ˆ๋‹ค.

์šฉ๋Ÿ‰์€ ์ธ์ฝ”๋”ฉ ๋ชจ๋“œ์—๋„ ์ขŒ์šฐ๋ฉ๋‹ˆ๋‹ค — ์ˆซ์ž(numeric)(์ˆซ์ž๋งŒ)๊ฐ€ ๊ฐ€์žฅ ๋ฐ€๋„๊ฐ€ ๋†’๊ณ , ๋‹ค์Œ์ด ์˜์ˆซ์ž(alphanumeric)(0–9, A–Z, ์ผ๋ถ€ ๊ธฐํ˜ธ), ๊ทธ๋‹ค์Œ์ด ๋ฐ”์ดํŠธ(byte)(UTF-8)์ž…๋‹ˆ๋‹ค. ๋ฒ„์ „ 40์—์„œ ๋ ˆ๋ฒจ L์ผ ๋•Œ ์ฝ”๋“œ๋Š” ์ˆซ์ž 7,089์ž๋ฆฌ, ์˜์ˆซ์ž 4,296์ž, ๋˜๋Š” 2,953๋ฐ”์ดํŠธ๊นŒ์ง€ ๋‹ด์Šต๋‹ˆ๋‹ค. ๋งˆ์ง€๋ง‰์œผ๋กœ ๋งˆ์Šคํฌ ํŒจํ„ด์ด ์ ์šฉ๋ฉ๋‹ˆ๋‹ค. ์ธ์ฝ”๋”๋Š” ์—ฌ๋Ÿฌ ๋งˆ์Šคํฌ๋ฅผ ์‹œ๋„ํ•ด ํ‘๋ฐฑ ๋ถ„ํฌ๊ฐ€ ๊ฐ€์žฅ ๊ท ํ˜• ์žกํžŒ ๊ฒƒ์„ ์œ ์ง€ํ•˜๋ฏ€๋กœ, ๋ฆฌ๋”๊ฐ€ ๋ชจ์„œ๋ฆฌ์˜ ํŒŒ์ธ๋”/ํƒ€์ด๋ฐ ํŒจํ„ด๊ณผ ๋ฐ์ดํ„ฐ ๋ชจ๋“ˆ์„ ๊ตฌ๋ถ„ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์ž์ฃผ ์“ฐ๋Š” ๊ฒฝ์šฐ

  • ํฌ์Šคํ„ฐ๋‚˜ ๋ช…ํ•จ์—์„œ URL ์ž…๋ ฅ ์—†์ด ์›น์‚ฌ์ดํŠธ๋กœ ์—ฐ๊ฒฐํ•˜๊ธฐ
  • ๊ฒŒ์ŠคํŠธ๊ฐ€ ์Šค์บ”ํ•ด ๋ฐ”๋กœ ์—ฐ๊ฒฐํ•  ์ˆ˜ ์žˆ๋Š” Wi-Fi ์ž๊ฒฉ์ฆ๋ช… ๊ณต์œ 
  • vCard๋ฅผ ์ธ์ฝ”๋”ฉํ•ด ํœด๋Œ€ํฐ์ด ์—ฐ๋ฝ์ฒ˜๋ฅผ ๋ฐ”๋กœ ๊ฐ€์ ธ๊ฐ€๊ฒŒ ํ•˜๊ธฐ
  • ์ œํ’ˆ ๋ผ๋ฒจ์ด๋‚˜ ์‹๋‹น ๋ฉ”๋‰ด์— ์•ˆ์ •์ ์ธ ๋งํฌ ๋ถ™์ด๊ธฐ

์‚ฌ์šฉ ์˜ˆ

URL https://example.com์˜ QR์„ ์ƒ์„ฑํ•ฉ๋‹ˆ๋‹ค. ์ธ์ฝ”๋”๋Š”:

input:  https://example.com   (24๋ฐ”์ดํŠธ, byte ๋ชจ๋“œ)
level:  M  (์•ฝ 15% ๋ณต๊ตฌ)
picks:  ๋ฒ„์ „ 1, 21x21 ๋ชจ๋“ˆ
applies: 8๊ฐœ ํ›„ ์ค‘ ์ตœ์  ๋งˆ์Šคํฌ
output: ์Šค์บ” ๊ฐ€๋Šฅํ•œ PNG

์งง์€ URL์€ ๋ฒ„์ „ 1์— ์—ฌ์œ  ์žˆ๊ฒŒ ๋“ค์–ด๊ฐ€ ๊ฒฐ๊ณผ ์ฝ”๋“œ๊ฐ€ ์ž‘์•„ ์ €ํ•ด์ƒ๋„์—์„œ๋„ ์Šค์บ”๋ฉ๋‹ˆ๋‹ค. ํ›จ์”ฌ ๊ธด URL์€ ์ธ์ฝ”๋”๋ฅผ ๋” ํฐ ๋ฒ„์ „๊ณผ ๋” ์กฐ๋ฐ€ํ•œ ํ–‰๋ ฌ๋กœ ๋ฐ€์–ด ์˜ฌ๋ฆฝ๋‹ˆ๋‹ค.

์ž์ฃผ ๋ฌป๋Š” ์งˆ๋ฌธ

QR ์ฝ”๋“œ๋ž€ ๋ฌด์—‡์ธ๊ฐ€์š”?

QR(Quick Response) ์ฝ”๋“œ๋Š” ํ‘๋ฐฑ ๋ชจ๋“ˆ์˜ 2์ฐจ์› ํ–‰๋ ฌ์ž…๋‹ˆ๋‹ค. ๊ฐ€๋กœ๋กœ๋งŒ ๋ฐ์ดํ„ฐ๋ฅผ ์ €์žฅํ•˜๋Š” 1์ฐจ์› ๋ฐ”์ฝ”๋“œ์™€ ๋‹ฌ๋ฆฌ QR์€ ๋‘ ๋ฐฉํ–ฅ ๋ชจ๋‘์— ๋ฐ์ดํ„ฐ๋ฅผ ์ €์žฅํ•˜๋ฏ€๋กœ URL, ์—ฐ๋ฝ์ฒ˜, Wi-Fi ์ž๊ฒฉ์ฆ๋ช…์„ ๋‹ด์œผ๋ฉด์„œ๋„ ํœด๋Œ€ํฐ ์นด๋ฉ”๋ผ๋กœ ์Šค์บ”ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

QR ๋ฒ„์ „ 1~40์€ ๋ฌด์—‡์„ ์˜๋ฏธํ•˜๋‚˜์š”?

๋ฒ„์ „์€ ํ–‰๋ ฌ์˜ ๋ฌผ๋ฆฌ์  ํฌ๊ธฐ๋ฅผ ์ •ํ•ฉ๋‹ˆ๋‹ค. ๋ฒ„์ „ 1์€ 21×21 ๋ชจ๋“ˆ์ด๊ณ  ๋ฒ„์ „์ด ์˜ค๋ฅผ ๋•Œ๋งˆ๋‹ค ํ•œ ๋ณ€๋‹น ๋ชจ๋“ˆ์ด 4๊ฐœ์”ฉ ๋Š˜์–ด ๋ฒ„์ „ 40์€ 177×177์ด ๋ฉ๋‹ˆ๋‹ค. ํฐ ๋ฒ„์ „์ด ๋” ๋งŽ์€ ๋ฐ์ดํ„ฐ๋ฅผ ๋‹ด์œผ๋ฏ€๋กœ, ์ธ์ฝ”๋”๋Š” ์ž…๋ ฅ๊ณผ ์„ ํƒํ•œ ์˜ค๋ฅ˜ ์ •์ • ๋ ˆ๋ฒจ์„ ๋ชจ๋‘ ๋‹ด์„ ์ˆ˜ ์žˆ๋Š” ๊ฐ€์žฅ ์ž‘์€ ๋ฒ„์ „์„ ๊ณ ๋ฆ…๋‹ˆ๋‹ค.

์˜ค๋ฅ˜ ์ •์ • ๋ ˆ๋ฒจ L, M, Q, H๋Š” ๋ฌด์—‡์ธ๊ฐ€์š”?

๋„ค ๊ฐ€์ง€ ๋ฆฌ๋“œ-์†”๋กœ๋ชฌ ๋ณต๊ตฌ ๋ ˆ๋ฒจ์ž…๋‹ˆ๋‹ค: L์€ ์†์ƒ ๋ชจ๋“ˆ ์•ฝ 7%, M์€ ์•ฝ 15%, Q๋Š” ์•ฝ 25%, H๋Š” ์•ฝ 30%๋ฅผ ๋ณต๊ตฌํ•ฉ๋‹ˆ๋‹ค. ๋†’์€ ๋ ˆ๋ฒจ์€ ๋”๋Ÿฌ์›€์ด๋‚˜ ๊ฐ€๋ฆผ์„ ๋” ๊ฒฌ๋””์ง€๋งŒ ๋ฐ์ดํ„ฐ ์šฉ๋Ÿ‰์ด ์ค„์–ด๋“ค์–ด, ๊ฑฐ์นœ ํ‘œ๋ฉด์— ์ธ์‡„ํ•˜๊ฑฐ๋‚˜ ๊ฐ€์šด๋ฐ ๋กœ๊ณ ๋ฅผ ๋„ฃ์„ ๋•Œ ์ ํ•ฉํ•ฉ๋‹ˆ๋‹ค.

QR ์ฝ”๋“œ๊ฐ€ ๋‹ด์„ ์ˆ˜ ์žˆ๋Š” ๋ฐ์ดํ„ฐ์— ์ตœ๋Œ€์น˜๊ฐ€ ์žˆ๋‚˜์š”?

๋„ค, ์ฝ˜ํ…์ธ  ์ข…๋ฅ˜์™€ ์˜ค๋ฅ˜ ์ •์ •์— ๋”ฐ๋ผ ๋‹ค๋ฆ…๋‹ˆ๋‹ค. ๋ฒ„์ „ 40์—์„œ ๋‚ฎ์€(L) ์ •์ •์ผ ๋•Œ QR์€ ์ˆซ์ž 7,089์ž๋ฆฌ, ์˜์ˆซ์ž 4,296์ž, ๋˜๋Š” ์›์‹œ ๋ฐ์ดํ„ฐ 2,953๋ฐ”์ดํŠธ๊นŒ์ง€ ๋‹ด์Šต๋‹ˆ๋‹ค. URL์€ ๊ฑฐ๋ฆฌ์—์„œ ์Šค์บ” ๊ฐ€๋Šฅํ•˜๋„๋ก ์งง๊ฒŒ ์œ ์ง€ํ•˜์„ธ์š”.

์ƒ์„ฑ๋œ ์ฝ”๋“œ๋Š” ๋งŒ๋ฃŒ๋˜๊ฑฐ๋‚˜ ์„œ๋ฒ„๊ฐ€ ํ•„์š”ํ•œ๊ฐ€์š”?

์•„๋‹™๋‹ˆ๋‹ค. ํ–‰๋ ฌ์€ ํ…์ŠคํŠธ์—์„œ ๋กœ์ปฌ๋กœ ๊ณ„์‚ฐ๋˜๋ฏ€๋กœ ์ฝ”๋“œ๋Š” ์˜๊ตฌ์ ์ด๋ฉฐ ์˜คํ”„๋ผ์ธ์œผ๋กœ ์ž‘๋™ํ•ฉ๋‹ˆ๋‹ค. ์งง์€ ๋งํฌ๋กœ ๋ฆฌ๋””๋ ‰์…˜ํ•˜๋Š” ๋™์  QR ์„œ๋น„์Šค๋งŒ ์„œ๋ฒ„๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค — ์ด ๋„๊ตฌ๊ฐ€ ๋งŒ๋“œ๋Š” ์ •์  QR์€ ๋งŒ๋ฃŒ๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.