VL: Checkout Address Validator

Address validation via checkout rules & shipping customization

by Valider · Launched: March 2023 · Free plan available.

2.4 (5) on Shopify Built for Shopify

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Prevent failed deliveries with address validation, checkout customization rule & advanced shipping.

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About VL: Checkout Address Validator

Valider app helps merchants prevent errors and improve checkout with address validator, custom checkout rules, and advanced shipping rules. Validate shipping and billing details in real time to reduce failed deliveries and order issues. Apply tailored rules to control checkout behavior, enforce input accuracy, and ensure smooth order processing. Integrates seamlessly with Shopify for an optimized, reliable checkout experience that saves time and enhances customer satisfaction. Validate shipping and billing addresses instantly during checkout process Auto address validation rules: PO Box, USPS, military address, and zip mismatch Apply checkout customization rules based on order value, items, or shipping info Advanced checkout customization to reorder, rename, or hide any fields easily Customize checkout prompts and language fully to match your unique brand tone Show more Show less

Last verified: July 17, 2026 · Fresh

App details

Developer: Valider
Category: Marketing & conversion
Pricing: Free plan available
Launched: March 2023
Rating: 2.4 (5) on Shopify

Key features

Runs with any Shopify plan
40+ Address & Customer validation rules
10+ common Cart validation rules
Warehouse-based fulfillment rules
Shipping & payment methods customization

Integrations with:

Checkout, DHL, Google Maps, Shopify Admin, Shopify Flow, UPS, USPS

1 plan · starts free

Premium

Free

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 99 Shopify App Store reviews

Use the arrows to read individual reviews

Great app for reducing customer mistakes during checkout. The instant address validation helps avoid shipping issues, and customizing fields is very straightforward. It integrates smoothly with Shopify and keeps our checkout process clean and reliable.

— BRITORA

Valider works really well for preventing address errors at checkout. It validates details instantly and helps us avoid failed deliveries. Customizing fields is easy, and the app fits smoothly into our Shopify setup.

— Club-Sole

Valider has made our checkout experience much more reliable. The app catches wrong or incomplete addresses instantly, which greatly reduces delivery issues. We also use the custom checkout rules to control what customers can enter, and it works perfectly. Easy to install, simple to manage, and very effective for any Shopify store.

— Toggo

We’ve seen fewer failed deliveries since installing VL: Checkout Address Validator. The custom checkout rules let us enforce exactly how we want addresses entered.

— Chic Apparel

Valider’s real-time address validation at checkout is a game changer — it catches typos, invalid zip codes, and PO boxes instantly, saving us from costly delivery mistakes.

— Cyber Cart

The customization options are also really helpful — reordering and renaming checkout fields to match our branding was super easy.

— Snout

Great app for keeping checkout clean and error-free. It flags PO Box and zip mismatches instantly, which has reduced our delivery issues a lot. We also enjoy the freedom to reorder or hide any fields. Setup was fast, and everything works seamlessly with Shopify. Definitely a helpful upgrade for our store.

— Bonanza Sleep

I love how Valider instantly validates addresses during checkout. It’s saved me so much time and prevented shipping errors.

— Synergy

Valider instantly validates addresses, eliminating returned packages from PO Boxes and military entries. It flags errors like zip mismatches at checkout, saving us money and dramatically cutting customer service time.

— Avenue Seven

Valider has made our checkout process simple and error free.The real time address check catches mistakes right away and helps avoid failed deliveries. The custom checkout rules are easy to set up and very flexible.

— Techshive

Valider has completely streamlined our checkout process! Address validation works perfectly and prevents delivery errors. I love how easy it is to customize checkout fields and rules. It’s a must-have tool for any Shopify store.

— My Store

We’ve been using Valider for a few weeks, and it already made a big difference. Customers enter fewer wrong addresses, and deliveries go smoothly. The advanced checkout customization options are perfect for our needs. It’s easy to manage and fits right into Shopify without any issues. Highly recommend for busy stores.

— Flux Decore

I tested VLD Valider for a few days on my Shopify store, hoping it would help catch address errors. In the past, I rarely had issues, mostly just missing house numbers on orders. Strangely, this app flagged 90% of them as needing corrections. At 0.04 cents per validated order, it’s not worth the hassle or the constant false positives. Save your time and money, stick to manual checks.

— Cilio Lash Expert

I hoped Valider would fix our checkout issues, but it kept flagging valid addresses. Some customers couldn’t finish their orders because of strict rules. The customization options felt confusing, and it took too long to set up. Not the smooth experience we expected.

— Everform

We love using Valider, especially during BFCM.No more failed orders or shipping errors. The custom checkout rules give us great control, and changing or hiding fields is super easy. Our customers now have a smooth checkout every time.

— KHLFA

Valider has made our checkout process so much smoother. Address validation works perfectly and reduces failed deliveries. The customization options let us tailor checkout exactly to our brand. Highly recommend for any store looking to boost conversions and avoid address errors

— GameCultureMedia

Valider is an excellent tool for preventing checkout errors. It validates customer addresses instantly and helps avoid shipping problems. I also like the flexibility to customize checkout fields and prompts to match our brand tone. It integrates smoothly with Shopify and keeps our checkout process efficient, accurate, and easy for customers.

— Fine Loom

Valider has really helped us avoid delivery problems! It catches address mistakes and wrong zip codes right away. It’s simple to set up and works perfectly with Shopify. Our checkout now feels faster, smoother, and more professional.

— KadMark

Valider has really helped us cut down on checkout mistakes.The live address check makes sure all shipping details are correct, and the custom checkout rules give us great control. It works perfectly with Shopify and makes everything run smoothly. Our failed deliveries went down right away highly recommend it.

— Collectionswear

Absolutely love Valider! It instantly validates addresses during checkout and saves us from delivery issues. The customization options are super flexible, and setup takes just minutes.

— TRENVO

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