BITCOIN, WITH ROOM TO EXPERIMENT

Your own little
Bitcoin universe.

Mine a block. Inscribe a thought. See it land in your wallet.
All in your browser, all with pretend money.

Create a test wallet to start your first loop.

Your test wallet

NOT CREATED

One wallet. A whole chain to play with.

Make some blocks

Skip the faucet queue. Every block gives you 50 fake BTC, ready to use immediately.

BLOCK HEIGHT0

PENDING TXS0

Auto miner

Auto mining OFF

Keep a lab tab open; browser throttling may delay blocks. Mining also confirms your pending inscriptions.

Leave a little something

INSCRIPTION LAB

Content typeOr upload a local file (16 KiB maximum)Parent inscription (optional, immutable)What will you put on your chain?JSON metadata (optional, independent of body)

0 / 2048 CBOR bytes · ord tag 5 · JSON is authoring format only

Review before signing

Two transactions: commit + reveal. 1,000 fake sats in fees; 1,000 fake sats reserved in your collectible. It returns to your current wallet.

The next button signs both transactions locally with this test wallet and submits them to your private chain.

04 / THE THINGS YOU MADE

Your inscriptions 0

Owned by this wallet

Your first inscription belongs here.
Fund your wallet, write some text, and make it yours.

05 / FOLLOW THE TRAIL

Chain explorer

MEMPOOLWaiting for the next block

commit + reveal transactions live here before mining

↓ mine

BLOCKSnewest first · click any block to inspect it

Indexes

Metadata is data; indexers are interpretation. Discovery uses the top-level metadata.protocol string. Raw events remain uninterpreted.

Discovered protocol names

Ordered raw events

Confirmed blocks in chain order, then mempool order.

Optional trusted local indexer

Derived state (separate from raw events)

No reducer selected.

API explorer LOCAL / IN-BROWSER

LocalOrdAPI reads this browser’s chain and indexes. These paths are not server URLs; the static host cannot access your lab.

Preset path Local API path

Choose a path and press Try.

Under the hood & attribution

Real serialized Bitcoin transactions, Schnorr signatures and Taproot commit/reveal scripts, on a deliberately simplified local UTXO chain. No proof of work, Bitcoin consensus, peer network, public broadcast, or production custody. Collectibles can only be spent by explicit child reveals that preserve the parent in the same wallet.

Built from and inspired by Supertestnet’s testnet_generator, inscriptions-online, and vanilla-js-browser-wallet. node_faker was evaluated for future RPC compatibility.

Transaction library: tapscript by Christopher Scott (CC-BY-1.0). Supertestnet CC0 license · noble-curves license · noble-hashes license.