Klipper vs Marlin: Which Firmware Is Better in 2026?

The firmware running on your 3D printer determines how it interprets G-code, controls motors, manages temperatures, and handles advanced features like input shaping and pressure advance. For most of 3D printing history, Marlin was the only serious option. Then Klipper came along and changed the conversation.

In 2026, both firmware options are mature, capable, and actively maintained. But they take fundamentally different approaches, and the right choice depends on your priorities and technical comfort level.

This guide compares Klipper and Marlin across every dimension that matters to help you decide.

The Fundamental Difference

Marlin runs entirely on your printer's mainboard. The 8-bit or 32-bit microcontroller handles everything: motion planning, temperature control, G-code parsing, and communication. Everything happens on one chip.

Klipper splits the work. A Raspberry Pi (or similar single-board computer) handles the computationally expensive tasks — motion planning, G-code parsing, and kinematics calculations. The printer's mainboard is reduced to a "dumb" stepper driver, executing the precise timing commands sent by the Pi.

This architecture gives Klipper access to dramatically more computing power. A Raspberry Pi 4 has roughly 1000x the processing capability of a typical printer mainboard. This matters for features like input shaping, which requires real-time frequency analysis and complex mathematical filtering.

Speed and Print Quality

Klipper Advantages

• Input shaping: Built-in, well-implemented, and easy to tune with an accelerometer. This is Klipper's killer feature. It enables significantly faster printing without ghosting artifacts.
• Pressure advance: More responsive than Marlin's linear advance, especially at high speeds.
• Higher step rates: The Raspberry Pi can generate step pulses faster than most mainboards, enabling higher microstepping and smoother motion at high speeds.
• More complex kinematics: CoreXY, delta, and other non-cartesian kinematics benefit from the Pi's processing power.

Marlin Advantages

• Proven track record: Marlin has been refined over a decade of use on millions of printers. It is extremely reliable.
• Linear advance: Marlin's equivalent to pressure advance. Works well, though some users find Klipper's implementation smoother at high speeds.
• Input shaping: Newer versions of Marlin (2.1.x+) now include input shaping support on 32-bit boards, narrowing the gap with Klipper.

The Verdict on Speed

Klipper has a clear advantage for maximum print speed. The combination of faster step rates, better input shaping, and more responsive pressure advance means Klipper printers can typically run 20-50% faster than the same hardware on Marlin before quality degrades. On printers with good mechanics (like CoreXY machines), the difference is even larger.

For typical printing speeds (40-80 mm/s), both firmwares produce excellent results and the differences are minimal.

Setup and Configuration

Klipper

Setup complexity: High

Klipper requires:

1. A Raspberry Pi (or equivalent) with Klipper software installed
2. A web interface (Mainsail or Fluidd) installed on the Pi
3. Custom firmware compiled and flashed to your printer's mainboard
4. A configuration file (printer.cfg) that defines every aspect of your printer

The configuration file is powerful but intimidating. You need to specify pin assignments, stepper motor parameters, endstop positions, probe offsets, and dozens of other settings. There are templates for common printers, but customization often requires reading documentation and understanding your hardware.

Making changes: Edit the printer.cfg text file and restart the firmware. No recompilation needed. Changes take effect in seconds. This is one of Klipper's biggest advantages — configuration changes that require recompiling Marlin are trivial in Klipper.

Marlin

Setup complexity: Low to Moderate

Most printers ship with Marlin pre-installed and configured. If you never need to change the firmware, setup is zero effort.

If you do need to modify Marlin:

1. Download the source code
2. Edit Configuration.h and Configuration_adv.h
3. Compile with PlatformIO (VS Code extension)
4. Flash the compiled firmware to your mainboard

The compilation step adds friction. Every change requires recompiling (which takes 1-5 minutes) and reflashing. For people who tinker frequently, this overhead adds up.

Making changes: Some settings can be changed via G-code (M commands) and saved to EEPROM. But many features require recompilation to enable or disable.

Web Interface and Remote Control

Klipper

Klipper requires a web interface, and both Mainsail and Fluidd are excellent:

• Clean, modern design
• Real-time graphs of temperature, speed, and position
• Built-in G-code console
• File management with drag-and-drop upload
• Macro support for custom commands
• Webcam integration
• Mobile-friendly

The web interface is part of the standard Klipper ecosystem and is always available.

Marlin

Marlin does not include a web interface. You control the printer via:

• The printer's LCD screen and control knob
• USB connection from a computer (using Pronterface or similar)
• OctoPrint (separate Raspberry Pi setup required)

Adding OctoPrint to a Marlin printer gives you web-based control, but it is an additional setup step. See our OctoPrint setup guide for details.

Feature Comparison Table

| Feature | Klipper | Marlin | |---------|---------|--------| | Input shaping | Excellent (built-in) | Good (32-bit boards only) | | Pressure advance | Excellent | Good (Linear Advance) | | Configuration | Text file (no recompile) | Requires recompilation | | Web interface | Built-in (Mainsail/Fluidd) | Requires OctoPrint | | LCD support | Limited | Extensive | | Multi-extruder | Good | Good | | Auto bed leveling | Good | Good | | Community support | Growing | Massive | | Documentation | Good | Extensive | | Setup difficulty | Hard | Easy (pre-installed) | | Requires Raspberry Pi | Yes | No | | Supports 8-bit boards | Yes | Yes | | Max step rate | Very high | Board-dependent | | Macro support | Excellent | Basic |

Cost Comparison

Marlin: Free. No additional hardware needed (it runs on your existing mainboard).

Klipper: The firmware is free, but you need additional hardware:

• Raspberry Pi 4 — $35-55
• MicroSD card — $8-12
• Power supply — $8-10
• ADXL345 accelerometer (for input shaping) — $5-10

Total additional cost: roughly $60-90. This is a one-time investment that serves for the life of the printer.

Which Should You Choose?

Choose Klipper if:

• You want to print as fast as possible
• You have a CoreXY or delta printer that benefits from higher step rates
• You enjoy tinkering and are comfortable with text-based configuration
• You want input shaping and pressure advance with the best possible implementation
• You already have a Raspberry Pi or do not mind buying one
• You make frequent configuration changes and want them to take effect without recompilation

Choose Marlin if:

• Your printer works well as-is and you do not want to change things
• You are new to 3D printing and want the simplest possible setup
• You do not have a Raspberry Pi and do not want to buy one
• Your printer uses an LCD screen extensively and you want full LCD support
• You print at moderate speeds and do not need the advanced motion features
• You want the largest possible community and documentation base

The Bambu Lab Question

Bambu Lab printers run their own proprietary firmware, not Klipper or Marlin. Their firmware includes input shaping, pressure advance, and network connectivity out of the box. If you own a Bambu Lab printer, the Klipper vs Marlin question does not apply to you.

Migrating from Marlin to Klipper

If you decide to switch, the process involves:

1. Setting up a Raspberry Pi with Klipper, Moonraker, and Mainsail/Fluidd
2. Compiling Klipper firmware for your specific mainboard
3. Flashing the compiled firmware to your printer's mainboard
4. Creating a printer.cfg configuration file for your printer

The Klipper documentation provides installation instructions and configuration references. Community-maintained configuration files for popular printers are available on GitHub.

The Klipper subreddit and Klipper Discord are excellent resources for troubleshooting during migration.

Final Thoughts

In 2026, both Klipper and Marlin are excellent firmware choices. The gap has narrowed as Marlin adds features like input shaping that were previously Klipper-only. But Klipper still leads in raw speed capability, configuration flexibility, and web interface quality.

The best firmware is the one that matches your skill level and priorities. If your printer works well on Marlin and you are happy with the results, there is no compelling reason to switch. If you want to push your printer's performance to its limits, Klipper is the way to go.

For finding calibration models and test prints to benchmark your firmware choice, use 3DSearch to search across Printables, MakerWorld, and Thingiverse.

Which firmware runs your printer?