TP-Link Archer AX21 v4 OpenWrt Firmware
The TP-Link Archer AX21 v4 is supported by OpenWrt on the ramips/mt7621 target. 3 firmware images are available from the official OpenWrt 25.12.5 stable release — download one below, or build a custom OpenWrt image for this device with your own package selection.
Build matrix
Supported firmware versions
| Distribution | Version | Target | Profile |
|---|---|---|---|
| OpenWrt | 25.12.5 | ramips/mt7621 | tplink_archer-ax21-v4 |
Downloads
Download images
OpenWrt 25.12.5 · ramips/mt7621
| Image | Type | sha256 |
|---|---|---|
| openwrt-25.12.5-ramips-mt7621-tplink_archer-ax21-v4-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt. | sysupgrade | 92a170c83402… |
| openwrt-25.12.5-ramips-mt7621-tplink_archer-ax21-v4-squashfs-factory.bin For first-time flash from stock firmware. | factory | 702e8db391f0… |
| openwrt-25.12.5-ramips-mt7621-tplink_archer-ax21-v4-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery. | kernel | 466ac28762b8… |
Downloads are served by the official OpenWrt mirrors — unchanged upstream stable builds.
Packages & install
Default packages & installation
Default packages
Every image for the TP-Link Archer AX21 v4 ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.
Device packages (2)
kmod-mt7915-firmware -uboot-envtools
Target default packages (29)
apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fstools kmod-crypto-hw-eip93 kmod-gpio-button-hotplug kmod-leds-gpio kmod-nft-offload libc libgcc libustream-mbedtls logd mtd netifd nftables odhcp6c odhcpd-ipv6only ppp ppp-mod-pppoe procd-ujail uboot-envtools uci uclient-fetch urandom-seed urngd wpad-basic-mbedtls
Installation notes
- First install from stock firmware: flash the factoryimage through the vendor firmware's upgrade page or recovery mode.
- Already running OpenWrt or ImmortalWrt: flash the sysupgrade image from LuCI (System → Backup / Flash Firmware) or with the sysupgrade command.
- The kernel / initramfs image boots from RAM without writing to flash — useful for a first install or for recovering from a failed flash.
- Verify your download against the published checksum before flashing:
$ sha256sum openwrt-25.12.5-ramips-mt7621-tplink_archer-ax21-v4-squashfs-sysupgrade.bin 92a170c834026331c8a9dffa762fa9a63bb03722b143d6e562f6bdc8f39d8b66 openwrt-25.12.5-ramips-mt7621-tplink_archer-ax21-v4-squashfs-sysupgrade.bin
Build custom firmware
Need more than the default image for the TP-Link Archer AX21 v4? Pick your packages — LuCI apps, themes, VPN clients — set the basics, and get a ready-to-flash OpenWrt image assembled from official packages in minutes.
Customize firmware for this deviceRelated
Related devices
More TP-Link devices
- TP-Link AD7200 v1/v2 OpenWrt firmware
- TP-Link Archer A6 V3 OpenWrt firmware
- TP-Link Archer A7 v5 OpenWrt firmware
- TP-Link Archer A9 v6 OpenWrt firmware
- TP-Link Archer AX23 v1 OpenWrt firmware
- TP-Link Archer AX80 v1 OpenWrt firmware
- TP-Link Archer AX80 v1 (EU) OpenWrt firmware
- TP-Link Archer C2 v1 OpenWrt firmware
More devices on ramips/mt7621
Upstream
Upstream & source
Images are assembled from packages compiled and published by the upstream OpenWrt and ImmortalWrt projects. The complete corresponding source code is available from those projects under the GPL.