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MarlinFirmware

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Marlin
Marlin is a firmware for RepRap 3D printers optimized for both 8 and 32 bit microcontrollers. Marlin supports all common platforms. Ma...

C++ · 17590 stars
Configurations
Configurations for Marlin Firmware

C · 2278 stars
MarlinDocumentation
Marlin Firmware Documentation Project

JavaScript · 398 stars
AutoBuildMarlin
Visual Studio Code extension to more easily build Marlin Firmware

JavaScript · 285 stars
U8glib-HAL
Customized U8glib for use in Marlin 2.0

C · 52 stars
MarlinBuilds
Built binaries of Marlin based on published Marlin Configurations.

49 stars

Beginner friendly Everything

Open All

[FR] Pre-heating Bed/Nozzle notice when using the Z-Probe Wizard Open

T: Feature Request

Difficulty 3/5 1-2 days Newbie friendliness 55/100

MarlinFirmware/Marlin#28584 · 2 comments · Opened Sep 16, 2026
[BUG] Hotend fan is not running when hotend heats up Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 42/100

MarlinFirmware/Marlin#28582 · Opened Sep 13, 2026
[BUG] Stable 2.1.x regression: CardReader::diveToFile() uses an unterminated dosSubdirname Open

Bug: Potential ?

Difficulty 1/5 Under an hour Newbie friendliness 92/100

MarlinFirmware/Marlin#28579 · Opened Sep 13, 2026
[BUG] MKS Robin E3 V1.1: I2C EEPROM failures with mks_robin_e3 STM32duino environment; Maple passes identical stress test Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 45/100

MarlinFirmware/Marlin#28576 · 2 comments · Opened Sep 12, 2026
[BUG] Display on SPI Interface seperate from SD does not work Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 48/100

MarlinFirmware/Marlin#28569 · Opened Sep 10, 2026
[BUG] Bed Level offset wrong on first level. Second level corrects offset Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 48/100

MarlinFirmware/Marlin#28489 · 10 comments · 1 reaction · Opened Jul 19, 2026
Enable private vulnerability reporting for a security disclosure Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

MarlinFirmware/AutoBuildMarlin#100 · 1 comment · Opened Jul 9, 2026
[BUG] Auto-leveling is not working properly. Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MarlinFirmware/Marlin#28478 · 6 comments · Opened Jun 30, 2026
[BUG] FILAMENT_CHANGE_RESUME_ON_INSERT does not automatically continue after filament insertion Open

Bug: Potential ?

Difficulty 3/5 1-2 days Newbie friendliness 48/100

MarlinFirmware/Marlin#28473 · 1 comment · Opened Jun 27, 2026
[Configuration/LCD] Add standalone configuration defaults and LCD menu controls for Non-Linear Extrusion parameters (A, B, and C) Open

T: Feature Request

Difficulty 3/5 1-2 days Newbie friendliness 68/100

MarlinFirmware/Marlin#28463 · 1 comment · Opened Jun 18, 2026
[Configuration] Enable MPC_EDIT_MENU and MPC_AUTOTUNE_MENU by default Open

T: Feature Request

Difficulty 1/5 Under an hour Newbie friendliness 75/100

MarlinFirmware/Marlin#28462 · 2 comments · Opened Jun 18, 2026
Auto Build Marlin doesn't run Platformio in builds in Linux VSCode Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/AutoBuildMarlin#99 · 1 comment · Opened May 28, 2026
[BUG] Problem with scara homing Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MarlinFirmware/Marlin#28441 · 12 comments · Opened May 21, 2026
JGAurora A5S is in a boot loop (keeps restarting after loading) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/MarlinBuilds#12 · Opened May 18, 2026
[BUG] MPC causes Thermal Runaway when fan is running Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MarlinFirmware/Marlin#28420 · 2 comments · 1 reaction · Opened Apr 29, 2026
[BUG] Intermittent Z homing failure on MKS TinyBee with TMC2209 standalone after successful first home Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/Marlin#28419 · 2 comments · Opened Apr 28, 2026
[FR] G29 P1 with automated supend Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 45/100

MarlinFirmware/Marlin#28408 · 3 comments · Opened Apr 22, 2026
[FR] Add firmware Z banding/"Z wobble" compensation Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 35/100

MarlinFirmware/Marlin#28405 · 2 comments · Opened Apr 19, 2026
[FR] Support for using a seperate Z stop with a probe (simplified) Open

T: Feature Request

Difficulty 3/5 1-2 days Newbie friendliness 55/100

MarlinFirmware/Marlin#28393 · 1 comment · Opened Apr 15, 2026
[FR] Update to Chitu pins files adds support for 12864,CR10 and BTT TFT35 LCD screens Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 48/100

MarlinFirmware/Marlin#28392 · Opened Apr 15, 2026
Adapting the documentation of movement limits (feedrate, acceleration, jerk) for delta and other kinematics Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

MarlinFirmware/MarlinDocumentation#617 · 4 comments · Opened Mar 23, 2026
[FR] Support custom kinematics (e.g. non-linear delta) Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 35/100

MarlinFirmware/Marlin#28366 · 1 comment · Opened Mar 19, 2026
[FR] Adding option for backup Z-limit switch (w/probe) Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 48/100

MarlinFirmware/Marlin#28351 · 1 comment · 1 reaction · Opened Feb 25, 2026
[FR] M600 upgrade Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 25/100

MarlinFirmware/Marlin#28348 · Opened Feb 21, 2026
[FR] Filament runout sensor Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MarlinFirmware/Marlin#28347 · 1 comment · Opened Feb 21, 2026
[FR] FTM and mixing extruder : feedback and help wanted Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/Marlin#28339 · Opened Feb 13, 2026
[FR] How to display the number of completed print cycles in Marlin Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MarlinFirmware/Marlin#28332 · Opened Feb 11, 2026
[BUG] `Z_MAX_POS` for Monoprice 18360 / Wanhao i3 2.1 is too small Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 45/100

MarlinFirmware/Configurations#1175 · 1 comment · Opened Feb 7, 2026
[BUG] BIGTREETECH GTR.1_0 mismatched env: names Open

Bug: Confirmed !

Difficulty 3/5 1-2 days Newbie friendliness 45/100

MarlinFirmware/Marlin#28315 · 4 comments · Opened Feb 1, 2026
[FR] non-linear advance Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 25/100

MarlinFirmware/Marlin#28290 · 56 comments · Opened Jan 20, 2026
[FR] Project Examples for PlatformIO Registry Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

MarlinFirmware/U8glib-HAL#37 · Opened Jan 12, 2026
[BUG] SMOOTH_LIN_ADVANCE stops my printer from extruding Open

Bug: Potential ?

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/Marlin#28264 · 4 comments · Opened Jan 3, 2026
Kingroon KP3 screen is flipped vertically on 2.1.2.5, 2.1.2.6 and 2.1.3-b3 Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

MarlinFirmware/MarlinBuilds#10 · Opened Dec 26, 2025
[FR] VCNL3020 driver i wrote for bed leveling Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/Marlin#28236 · 6 comments · Opened Dec 18, 2025
[FR] [FT Motion] Add native timer frequency to HAL Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 35/100

MarlinFirmware/Marlin#28206 · 4 comments · 1 reaction · Opened Dec 5, 2025
[BUG] Ultimaker 2+ shall have BLOCK_BUFFER_SIZE of 8 instead of 16 when SD is enabled only Open

bug

Difficulty 1/5 1-3 hours Newbie friendliness 55/100

MarlinFirmware/Configurations#1167 · Opened Dec 3, 2025
[FR] FT_MOTION: Option to fully disable classic motion to save 16k of FLASH (and a bit of RAM) Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/Marlin#28163 · 6 comments · 1 reaction · Opened Nov 8, 2025
reversed extruder direction still a thing? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MarlinFirmware/MarlinBuilds#8 · 6 comments · Opened Nov 4, 2025
[FR] [SAFETY] extended Endstop handling (endstop mux), lowering of possible damages Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 25/100

MarlinFirmware/Marlin#28110 · 1 reaction · Opened Oct 12, 2025
[FR] Color UI redesign Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 25/100

MarlinFirmware/Marlin#28088 · 2 comments · Opened Oct 2, 2025
Suggestion: M593 Input Shaping Calibration Tower Slicer G-Code Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

MarlinFirmware/MarlinDocumentation#604 · 5 comments · Opened Oct 1, 2025
Feature Request: Add startup G-code to IS Calibration Tool Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

MarlinFirmware/MarlinDocumentation#602 · 1 comment · 1 reaction · Opened Sep 28, 2025
[FR] Ability to disable Live Movement when using Creality DWIN UI. Open

T: Feature Request

Difficulty 3/5 1-2 days Newbie friendliness 55/100

MarlinFirmware/Marlin#28062 · 2 comments · Opened Sep 20, 2025
error: expected unqualified-id before '{' token { Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

MarlinFirmware/U8glib-HAL#36 · 1 comment · Opened Sep 18, 2025
[FR] (I2S stepper stream, increasing frequency or separate dir/step through i2s/gpio) Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 25/100

MarlinFirmware/Marlin#28054 · 1 comment · Opened Sep 12, 2025
[FR] Clarify M119 output for endstops and filament runout sensors (add pin state info) Open

T: Feature Request

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/Marlin#28042 · 2 comments · 1 reaction · Opened Sep 7, 2025
[FR] Add proper "CNC Mode" to disable heaters and thermal checks (GT2560 Rev A+ CNC use case) Open

T: Feature Request

Difficulty 5/5 Over a week Newbie friendliness 28/100

MarlinFirmware/Marlin#28039 · 5 comments · Opened Sep 3, 2025
[BUG] LEVELING_FADE_HEIGHT issue with Ender 3 - should this setting be disabled? Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MarlinFirmware/Configurations#1153 · 2 comments · Opened Aug 27, 2025
Artillery Sidewinder X2 - Octoprint can't connect to printer connected to Octo4A Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MarlinFirmware/MarlinBuilds#5 · 1 comment · Opened Aug 25, 2025
[BUG] Ender 3 V2 GD32F303RET6 No Display Open

Bug: Confirmed !

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MarlinFirmware/Marlin#28010 · 7 comments · Opened Aug 13, 2025

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