Free QR Code Tools
Six free, browser-based tools that solve everyday QR and image problems — scan any QR, build UTM URLs, compress images, turn documents into PDFs, calculate QR print size, and verify scan reliability. No signup. No uploads. No watermarks.
Pick a Tool
Each tool is purpose-built and runs entirely in your browser. Click any card to start — no account needed.
QR Code Scanner
Scan any QR — no app required
Decode QR codes from your webcam, an uploaded image, or a screenshot — directly in the browser. Validates the destination URL against the QRLynx safety database before you click through.
- · Verify a printed QR before scanning with your phone
- · Decode a QR from a screenshot
- · Check whether a QR points to a malicious URL
UTM Builder
Build trackable campaign URLs
Generate properly-formatted UTM URLs for Google Analytics and Bing Ads — with validation, preset campaigns, and one-click QR code generation for the tagged URL.
- · Tag email and ad campaign links
- · Validate existing UTM URLs for typos
- · Generate a QR code for a UTM-tagged URL in one flow
Scan to PDF
Documents → searchable PDF
Turn document photos into clean, multi-page PDFs in your browser. Auto-detects edges, deskews, and combines pages — no upload, your documents never leave your device.
- · Digitise receipts, invoices, and contracts
- · Combine multiple pages into a single PDF
- · Share scanned documents via QR code
Image Compressor
Shrink images, keep quality
Compress JPG, PNG, WebP, and AVIF images in your browser. Tune quality, format, and dimensions — runs entirely client-side, no upload, no size limit.
- · Reduce image weight before adding to a website
- · Convert legacy JPGs to WebP or AVIF
- · Batch-compress images for email or messaging
QR Size Calculator
Right size for any print job
Calculate the minimum QR code size for any scan distance, based on ISO/IEC 18004 and Denso Wave guidelines. Outputs print dimensions in millimetres, inches, and pixels.
- · Size a QR for billboards, posters, or business cards
- · Avoid undersized codes that fail to scan
- · Plan print runs with confidence
QR Readability Checker
Score scan reliability
Run a 7-factor reliability score on any QR code: contrast ratio, error correction level, quiet zone, dot density, finder pattern integrity, logo coverage, and module clarity.
- · Verify a custom-designed QR scans on every device
- · Audit branded QRs before printing
- · Compare two design variants side-by-side
Why every tool is free
Every tool on this page solves a specific problem we hit while building QRLynx. Each one was easier to ship as a standalone, browser-based tool than to bury inside the dashboard — so we shipped them free, with no signup, no watermarks, and no scan or file-size limits. The paid product is the dynamic QR platform itself: editable destinations, scan analytics, password protection, smart redirects, lead capture, team workspaces, and white-label domains.
Rated 4.4 / 5 by Real Customers
Verified Trustpilot reviews from QRLynx users — no incentivized reviews, no AI-generated quotes.
"Excellent service and support team. Responded quickly to an urgent request without unnecessary questions. The best QR service I've used — reliable and responsive..."
Maths with V
"Free and easy to use! Straightforward navigation with numerous features. Great for launching a small business..."
Em and Em's Custom Magnets
"It's easy to generate QR codes. Navigation is fairly simple and user friendly. Happy with the result."
SN
Frequently Asked Questions
Common questions about the QRLynx free tools
Are these tools really free?
Yes — all six tools are 100% free with no signup, no watermarks, and no scan limits. They run entirely in your browser on Cloudflare's edge network. We make money on QRLynx Pro/Business plans for users who want dynamic QR codes, scan analytics, and team features.
Do you upload my files to a server?
No. The Image Compressor, Scan to PDF, QR Code Scanner, QR Code Size Calculator, and QR Code Readability Checker all run client-side — your files never leave your device. The UTM Builder operates on URLs you paste in; nothing is logged or stored.
Can I use these tools commercially?
Yes. There are no usage restrictions or commercial-use fees on any of the free tools. Many of our users use the QR Size Calculator and Readability Checker as part of paid client work — that's fine.
Why do you offer these for free?
Each tool solves a specific problem we hit while building QRLynx — and each one was easier to ship as a standalone tool than to bury inside the dashboard. Free tools build trust and bring users into the ecosystem; the paid product is the dynamic QR platform itself.
What's the difference between these tools and QRLynx Pro?
These tools handle one-off jobs: scan a QR, build a UTM URL, compress an image, etc. QRLynx Pro is a full QR code management platform — dynamic QR codes you can edit after printing, scan analytics, password protection, smart redirects, lead capture, team workspaces, and white-label domains.
Are there other tools coming?
Yes. The roadmap includes a barcode scanner, a vCard generator, and a WiFi QR code builder. Have a request? Message support@qrlynx.com — we add the tools our users actually use.
Ready to Transform Your QR Code Experience?
Create, customize, and track QR codes with a platform built for businesses, creators, restaurants, agencies, and teams worldwide.