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WEBSERIAL · WIRELESS SERIAL MONITOR · V2

Your serial monitor, unplugged.

WebSerial Pro streams your IoT device’s logs to any browser on the network and sends commands back - no USB cable, no IDE, no desk. With timestamps, exports and a terminal you can brand as your own.

Built on WebSerial· 648 stars on GitHub
$249$49−80%one-time, yours to keepAdd to bag
Anniversary Sale ends November 9
Instant access·Royalty-free license·6 months of updates
LIVE PREVIEWWEBSERIAL V2
ESP32 · S2 · S3 · C-SERIES ·ESP8266 ·ARDUINO CORE ·TWO-WAY OVER WIFI ·JSON · CSV · TXT EXPORT ·SYNCED TIMESTAMPS ·ESP32 · S2 · S3 · C-SERIES ·ESP8266 ·ARDUINO CORE ·TWO-WAY OVER WIFI ·JSON · CSV · TXT EXPORT ·SYNCED TIMESTAMPS ·
01 · TWO-WAY

Talk back to your firmware.

WebSerial is two-way: a command bar in the browser, an onMessage handler in your code. Example round trip:

5:58:53 PM> led on
5:58:57 PM[ok] LED_1 → HIGH
5:59:01 PM> status
5:59:05 PM[info] uptime 42d 03:11 · heap 118 kb · rssi -52 dBm
5:59:09 PM> reboot
5:59:13 PM[boot] restarting…
Enter command here
02 · WHAT YOU GET

Inside WebSerial Pro

A session you can actually work with
Timestamped, exportable, pinned when you need it - and dressed in your brand.
5:58:53 PM
SYNCED TIMESTAMP
LIVE STREAM
JSONCSVTXT
↓ EXPORT ANY SESSION
12:04:31.248temp=24.6C hum=61%
12:04:32.501wifi rssi -52 dBm
12:04:33.014[ok] LED_1 → HIGH
Timestamps, synced
Wall-clock accuracy without an onboard RTC
JSONCSVTXT
↓ session-042.csv · 18,204 lines
Take the session with you
JSON, CSV or plain text - one click
Pin the view
Hold your place while logs keep flowing
>
webSerial.setInput(true);
The command bar, your call
Show or hide it straight from C++
AaAaAaLOGO
Your terminal, your type
Custom fonts, sizing & your logo
Export logs - JSON / CSV / TXT Synced timestamps (no RTC) Lock scroll Toggle input bar from C++ Custom fonts & terminal sizing White-label branding Terminal UI source code Private repo & Discord access
03 · OPEN-SOURCE VS PRO

Already using open-source WebSerial?

The free version is AGPL-3.0: shipping it inside a closed-source product means open-sourcing your firmware. Pro swaps in a commercial license and turns the terminal into a real tool.

$249$49 · ONE-TIME
Browser serial monitor over WiFi
Two-way command input
Export logs (JSON / CSV / TXT)
Synced timestamps (no RTC)
Lock scroll & input bar control
Custom fonts & terminal sizing
White-label branding
Terminal UI source code
LicenseSCL-1.3 commercial
DeliveryPrivate repo + Discord
SupportPriority Discord & email
Upgrade to Pro · $249$49One-time payment · 6 months of updates
04 · FIELD NOTES

Engineers ship with it.

Notes from teams running WebSerial Pro in production.

“WebSerial Pro means I debug deployed boards from the couch. It’s a little unfair.”
Sam O. · Hardware maker
05 · BEFORE YOU BUY

Questions, answered.

Anything else? Write to [email protected] - a human answers within a day.

Which boards does WebSerial Pro support?+
Can I send commands, or only read logs?+
How do timestamps work without an RTC?+
Can I ship it in a commercial, closed-source product?+
What happens right after I pay?+
Can I get a refund if it doesn’t fit?+
Better together

Need more than WebSerial?

Get WebSerial Pro together with ESP-DASH, ElegantOTA and NetWizard Pro - every library in one checkout, for $27 less than buying the four one by one.

Best value · save 82%
4 Library Bundle
All four Pro libraries - ESP-DASH, ElegantOTA, WebSerial, NetWizard. Private repo access to each and the Pro Discord, in a single checkout.
$996$179
Save $817 on regular prices · $27 less than the four on sale
Cut the cable for good.

One payment of $249$49. Private repository access, Discord support, unlimited devices - and 6 months of updates included.

Add to bag · $249$49Anniversary Sale ends November 9Not sure yet? Evaluate the open-source version first.
Instant repo access Private Discord 6 months of updates Secure checkout
Shipping a product with WebSerial Pro? We built it, and our engineers can design the rest of your device too, from the electronics and firmware to the cloud dashboard and mobile app.Free engineering review
WebSerial Pro
WebSerial Pro$249$49Add to bag