EFU — ESP Flash Utility

EFU

ESP Flash Utility — browser-based, no server required

No Port

No Chip

Checking Web Serial...

Connection

Serial Port

Baud Rate

Chip

Operation

Flash Address (hex, comma-separated for multi)

Flash Size

Flash Mode

Firmware

↔

Drop .bin file or click to browse

Starting...

Output

EFU — ESP Flash Utility

Web Serial API — no backend required

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Ready. Select a port and click Connect.