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Yellowdex

Label every address. Turn chaos into context.

Y Context for every crypto address

Label every address. Turn chaos into context.

Yellowdex keeps context tethered to every address—on explorers, wallets, dashboards, marketplaces, and forums. Save labels to collections and share them with your team.

Local-first labels; you control sharing.
Etherscan token transfers before Yellowdex labels are visible
Etherscan token transfers after Yellowdex labels are visible
Before
After

Drag to compare Etherscan before and after Yellowdex.

How it works

Dex-level context in three steps.

Keep your address intel close to the surface. Yellowdex rides along anywhere you see an address and lets you capture, organize, and reuse that knowledge instantly.

1

Spot an address

Yellowdex floats beside any address you see on explorers, wallets, dashboards, and marketplaces.

2

Label it in a tap

Assign an entity, add a label and color-coded tags. Your labels appear everywhere you browse.

3

Save to a collection

Organize labels into collections (like a contact list) and share them with teammates or the public.

What you get

Built for power labelers.

Structured, fast, and always on top of the page you are reading.

Works wherever you browse

Detects addresses automatically on any page you visit—no special integrations needed. If a site shows an address, Yellowdex will find it.

EtherscanTwitterDiscordDocs

Smart search with filters

Search with prefix syntax: a:0x123 for addresses, l:exchange for labels, e:uniswap for entities. Filter by current page or labeled status.

a: addressl: labele: entityFilters

Signal what matters

Create custom color-coded tags to mark addresses however you choose. Pre-built risk categories coming soon.

Custom tagsTeamDeFiOTC

Sync across devices

Connect your wallet to sync labels across browsers, or keep everything local—your choice. Backups and exports always available.

Wallet syncLocal-firstPrivacyExport

Latest release

Fresh from the Yellowdex extension.

Release notes are pulled from the Yellowdex extension repo whenever a new version ships.

View all release notes
v2.0.0-beta Jul 3, 2026

v2.0.0-beta

This is a major release: your labels now sync across devices. Sign in with your wallet and your collections, entities, tags, and address labels follow you from one browser to another — local-first, so everything still works instantly offline and syncs in the background. It also reworks tags and entities to live inside collections, and adds a sync status indicator and conflict resolution for edits made on two devices at once.

What's New

  • Cross-device sync (local-first). Once you sign in, your address labels, entities, tags, and collections sync across every device where you're signed in. Writes still save locally and instantly — sync happens in the background (a periodic pull, a sync shortly after you make changes, and one when you open the popup), so nothing blocks on the network and everything works offline.
  • Wallet login. A new Account section in Settings lets you sign in with your wallet using a hosted signature flow (EIP-712) — no password. Signed out, the extension works exactly as before, entirely on your device.
  • Sync status at a glance. A status dot in the popup header shows where sync stands — signed out, syncing, up to date, needs attention, or a conflict to review — with details in the Sync settings.
  • Conflict resolution. If the same label is edited on two devices, the most recent edit wins and the one that lost is set aside for you rather than silently dropped. A review modal lets you keep your version or the other device's, one conflict at a time or all at once.
  • Collection-scoped tags & entities. Tags and entities now belong to a specific collection instead of one global list, matching how the server organizes them. Each collection has its own vocabulary, and the label form's entity/tag pickers show the ones for the collection you're labeling into.

Fixes & Improvements

  • Addresses move cleanly between collections. Editing an address's collection now moves it (instead of leaving a stray copy), and the popup shows addresses grouped under each collection.
  • Export no longer drops references to deleted entities. Dangling references are handled so exports stay complete.
  • Manage Entities shows the owning collection, so it's clear which collection an entity belongs to.
  • Fixed invalid NUL bytes that could appear in label data.

Notes

  • Your existing data upgrades automatically. Tags and entities that were global are split per collection — each collection that used a tag/entity gets its own copy, and anything unreferenced is homed in your Default collection. No action needed, and labels keep working.
  • New permissions: identity (for wallet sign-in) and alarms (to schedule background sync). Sync and login are opt-in — if you never sign in, neither is used.
  • Sync requires signing in. Signed out, everything stays local exactly as in previous versions; nothing is sent anywhere.

Trust & safety

Built for teams who care about context.

Privacy-first by design. Keep sensitive intel local, and publish only what’s meant to be shared. Export your data, back it up, and keep your notes portable.

Local-first defaults

No surprise syncs—opt in to sharing.

Backups & exports

Export to JSON anytime.

Team-friendly

Share read-only links for collections.

No dark patterns

Clear controls, reversible choices.

FAQ

Answers at a glance.

Questions about the extension, sharing, and supported surfaces. Want more? Drop us a note when you request access.

Where do my labels live?

Labels are local-first. You choose what to sync, what to export, and what to share with others.

Which sites are supported?

Any site that surfaces addresses. We prioritize major explorers, wallets, dashboards, and marketplaces.

Can I collaborate with a team?

Yes. Create a shared collection, generate a read-only link, and keep a single source of truth for labels.

What about other browsers?

Chrome first. Firefox and Edge are on the roadmap—join the list to be notified.

Get Yellowdex

Install Yellowdex on Chrome.