# Username Inspector

> Free web tool to check username availability across eBay, Poshmark, Depop, Etsy, Grailed, Vinted, Mercari, Whatnot, Bonanza, Ruby Lane, and Chairish. Check multiple usernames across multiple selling platforms at once. No registration required. Completely free.

Username Inspector is a client-side web utility for resellers and online sellers who need consistent branding across e-commerce platforms. Enter comma-separated usernames, select which platforms to check, and instantly generate direct profile links to verify availability. All processing happens in the browser — no usernames are stored, logged, or transmitted.

## Supported Platforms

- eBay (ebay.com/usr/{username})
- Poshmark (poshmark.com/{username})
- Depop (depop.com/{username})
- Etsy (etsy.com/shop/{username})
- Grailed (grailed.com/users/{username})
- Vinted (vinted.com/member/{username})
- Mercari (mercari.com/u/{username})
- Whatnot (whatnot.com/user/{username})
- Bonanza (bonanza.com/booths/{username})
- Ruby Lane (rubylane.com/shop/{username})
- Chairish (chairish.com/shop/{username})

## Pages

- [Username Inspector Tool](https://usernameinspector.com): Main tool for checking username availability across 11+ selling platforms
- [FAQ](https://usernameinspector.com/faq/): Frequently asked questions about username checking, supported platforms, privacy, and troubleshooting
- [About](https://usernameinspector.com/about/): How Username Inspector works, supported platforms, use cases, and comparisons to alternatives
- [Blog](https://usernameinspector.com/blog/): Tips and guides for resellers on choosing usernames and building brand consistency
- [Best Poshmark Usernames: How to Pick One That Sells](https://usernameinspector.com/blog/best-poshmark-usernames/): Your Poshmark username is permanent — almost. Here's how to pick a name that builds a real brand before you run out of chances to change it.
- [How to Change Your Username on Every Reselling Platform](https://usernameinspector.com/blog/how-to-change-your-username-on-every-reselling-platform/): Rebranding? Outgrew your old name? Here's exactly how to change your username on each platform — and what you'll lose if you're not careful.
- [What to Do When Your Username Is Already Taken](https://usernameinspector.com/blog/what-to-do-when-your-desired-username-is-already-taken/): Your perfect username is taken on two platforms. Here's how to find an alternative that's just as good — or better.
- [eBay Username Search: Find, Look Up & Check Any eBay User](https://usernameinspector.com/blog/ebay-username-search/): eBay removed its Find a Member tool, but there are still several ways to search for any eBay username. Here's how to find existing users and check if a name is available.
- [How to Start Selling on Every Major Reselling Platform](https://usernameinspector.com/blog/how-to-start-selling-on-every-major-reselling-platform/): A platform-by-platform guide to signing up, listing your first item, and understanding the fees on all seven major reselling platforms.
- [eBay Selling Guide: What New Sellers Need to Know](https://usernameinspector.com/blog/ebay-selling-guide-what-new-sellers-need-to-know/): eBay is the largest and most versatile reselling platform. Here's how to set up your account, optimize your listings, and build a seller reputation that drives sales.
- [How to Check eBay Username Availability (3 Methods)](https://usernameinspector.com/blog/how-to-check-ebay-username-availability/): Don't register an eBay account until you've checked whether your preferred username is actually available. Here are three free ways to find out.
- [Username Rules and Limits for Every Reselling Platform](https://usernameinspector.com/blog/username-rules-and-limits-for-every-reselling-platform/): Every platform has different username rules. Here's exactly what each one allows so you can pick a name that works everywhere.
- [New Platforms: Whatnot, Bonanza, Ruby Lane & Chairish](https://usernameinspector.com/blog/new-platforms-whatnot-bonanza-ruby-lane-chairish/): Username Inspector now supports 4 new reselling platforms — Whatnot, Bonanza, Ruby Lane, and Chairish. Check your username across all 11 marketplaces at once.
- [Choosing the Right Username for Your Reselling Brand](https://usernameinspector.com/blog/choosing-the-right-username-for-your-reselling-brand/): Your username shows up on every listing, every review, and every profile URL. Here's how to choose one that builds your brand across every reselling platform.

## Optional

- [Full Documentation](https://usernameinspector.com/llms-full.txt): Complete site content in a single markdown file