Free Tool

Bitcoin TX Accelerator

Stuck Bitcoin transaction? Paste your TX ID to check its mempool status and rebroadcast it across multiple Bitcoin relay networks to accelerate confirmation.

How it works

We fetch your raw transaction and rebroadcast it simultaneously to 18 independent Bitcoin relay networks, maximising miner visibility.

Is it safe?

Yes — we only need your transaction ID. Your private keys and wallet are never involved at any point.

Low-fee transactions

Rebroadcasting helps most with transactions that simply weren't propagated widely. For very low fee rates, RBF or CPFP are the reliable fix.

How Bitcoin Transaction Acceleration Works

Every unconfirmed Bitcoin transaction sits in the mempool — a waiting room shared across thousands of Bitcoin nodes. Miners pick transactions from the mempool to include in the next block, prioritising those with the highest fee rate (measured in satoshis per virtual byte, sat/vB). If your transaction was broadcast with a fee rate that was competitive at the time but the network has since become congested, it can be stuck for hours or even days.

A transaction accelerator works by rebroadcasting your raw transaction to as many relay nodes and mining pools as possible. Some transactions fail to propagate widely on first broadcast — especially those sent from light wallets that connect to only a few peers. Re-broadcasting pushes the transaction into parts of the network it had not yet reached, increasing the chance a miner sees it and includes it.

Zest rebroadcasts your transaction to 18 independent Bitcoin relay networks simultaneously. Only your transaction ID (txid) is needed — your private keys and wallet are never involved.

RBF and CPFP: On-Chain Fee Bumping

Rebroadcasting helps propagation, but for very low-fee transactions two on-chain mechanisms can bump the effective fee rate:

Replace-By-Fee (RBF)

If the original transaction was sent with RBF enabled (most modern wallets do this by default), you can create a new transaction that spends the same inputs but pays a higher fee. Miners replace the low-fee version with the high-fee one. RBF must be enabled on the original transaction — you cannot add it after the fact.

Child-Pays-for-Parent (CPFP)

If you control the destination address, you can spend the unconfirmed output in a new transaction with a high fee. Miners must confirm the parent transaction to collect the child fee, so they have an incentive to include both. CPFP works even if the original transaction did not have RBF enabled.

Rebroadcasting is the fastest no-cost option for transactions that simply have a propagation issue. If your fee rate is genuinely below what miners are currently accepting, RBF or CPFP is the reliable fix.

What Affects Bitcoin Confirmation Times?

Bitcoin targets one block every 10 minutes, but confirmation time varies based on three factors:

Fee rate — the higher your sat/vB, the more attractive your transaction is to miners. The fee chart above shows where your transaction stands relative to current network demand.
Mempool congestion — during peak periods (major market moves, high on-chain activity), the mempool can contain hundreds of megabytes of backlogged transactions. Low-fee transactions may wait until congestion clears.
Mining difficulty — difficulty adjusts every 2,016 blocks (~2 weeks). If hashrate drops temporarily (e.g. a mining pool goes offline), block times stretch beyond 10 minutes until the next adjustment.

Want a deeper explanation?

Our guide covers every acceleration method in detail — RBF, CPFP, rebroadcasting, and when to use each.

Read: How to Speed Up a Stuck Bitcoin Transaction