3D printing tools for beginners: the software and hand tools that save the most prints

The short answer

for the nine core hand tools

$86.83

for every slicer we recommend

$0

calibrations worth doing first

4

air changes an hour (NIOSH)

6+

The hand tools that save the most prints

Every tool here fixes a problem you will meet in your first month. Prices are from the retailer pages in our sources on November 12, 2026, for one example of each; any equivalent works.

Slicers: the most important software you will use

For resin printers, Lychee Slicer 8.0.4 has a free Lite tier (with ads on export) and CHITUBOX Basic is free with unlimited slicing, hollowing and supports; CHITUBOX Pro is $15.99 a month or $169 a year.

Your first design software

You will want to make your own parts sooner than you think: a hook that fits your shelf, a spacer, a name tag. Start simple, and pick the tool that matches the kind of thing you make. Our wiki compares the free CAD programs in more depth.

Four calibrations that fix most bad prints

Modern printers ship close to right, but filament changes everything. These four tests, in this order, fix most stringing, gaps, blobs and weak parts.

1. 1
   Extruder steps (e-steps)

   Mark the filament 120 mm above the extruder, ask for 100 mm, and measure what is left. If 100 mm asked is not 100 mm pushed, every other setting is off. Many current printers ship with this set; older Marlin machines often need it. E-steps calculator.

2. 2
   Flow rate

   Print a single-wall cube and measure the wall with calipers. The flow rate calculator turns that into the new flow ratio. OrcaSlicer has a built-in flow ratio test.

3. 3
   Pressure advance

   Print a pressure advance test (built into OrcaSlicer) and pick the cleanest corners. Bambu Studio runs this automatically on the H2D, X1 and A1.

4. 4
   Maximum volumetric speed

   Find how fast your hotend can melt plastic before it under-extrudes, then cap it in the filament profile. Volumetric flow calculator.

Good free references: our own calibration guide, Ellis' Print Tuning Guide (needs only a ruler, tape or a marker), the Teaching Tech calibration site (generates test G-code; preview it before printing) and the OrcaSlicer calibration wiki.

Check and fix files before you slice

Downloaded and generated models are often the wrong size, open, or too big for the bed. These free PrintPal tools run in your browser with no account.

3D model viewer Open STL, OBJ, 3MF and GLB files to check size and shape. Free Mesh repair Close holes, fix flipped normals and check a mesh is watertight before slicing. STL, OBJ, 3MF 3D model converter Convert between STL, OBJ, 3MF, GLB and PLY in the browser. Free 3D model splitter Cut a model that is too big for your bed into parts that fit. Free G-code viewer See every layer and move of a sliced file before it reaches the printer. Free Print time estimator Rough print time from size, layer height and speed. Free

Watching the printer from another room

Running printers from more than one brand, or want one app for all of them? SimplyPrint connects Bambu Lab printers through its own client app, recent Prusa printers directly, and anything else through Klipper or OctoPrint, with failure detection that watches for spaghetti, warping and blobs. More options are in AI failure detection.

Keep filament dry

Most filaments absorb water from the air. Wet filament strings, pops and crackles at the nozzle, prints rough surfaces and makes weaker parts, and it looks exactly like a settings problem. Dry it before you start changing settings.

• Dryers: Sunlu S2 $44.99 (list $79.99), Sunlu S4 $116.99, Creality Space Pi V2 $84.90.
• Storage: gasket boxes such as IRIS WeatherPro ($12.99 to $69.99) with desiccant, or a dry box with a hygrometer ($35.99 for Sunlu's). Sunlu says its SP2 box holds about 25% humidity inside when the room is about 50%.
• How long, how hot: it depends on the material. The filament drying calculator gives a temperature and time for PLA, PETG, TPU, nylon and more, and our filament drying guide has the full chart.

Filament drying calculator Temperature and time to dry PLA, PETG, TPU, nylon and more. Free Spool weight calculator How much filament is left on a spool. Free Filament finder Pick a material by strength, heat, flex and ease of printing. Free

Safety: the air, the heat and the fire risk

• Ventilate. NIOSH recommends at least 6 air changes an hour, a portable HEPA filter, or both; it found 3 air changes an hour was not enough.
• Place it well. Keep the printer away from return-air vents so particles do not spread through the house.
• Enclose hot materials. ABS and ASA print better and more safely in a vented enclosure; Creality's multifunction enclosure is $79.99.
• Do not leave it running unattended. That is UL's guidance because of fire risk. Fit a smoke detector in the room and use printers certified by a recognized testing lab.
• Resin is different. Wear nitrile gloves (not latex) and UV eye protection, clean up with IPA, and ventilate well: a University of Nebraska–Lincoln guide notes resin printing and post-processing can emit more than five times the VOCs of filament printing.

More detail, including fire safety and material-by-material advice, is in our 3D printing safety guide.

Free PrintPal tools beginners use most

These are ours. They are free, run in the browser and need no account.

Print cost calculator Filament, power and wear cost for any print. Free Printer finder Answer a few questions and compare printers that fit. Free Filament finder Pick a material by strength, heat, flex and ease of printing. Free Lithophane generator Turn a photo into a backlit print. Free Name plate generator Multi-color name plates and desk signs. Free Bin generator Storage bins and drawer organizers sized to the millimetre. Free

Frequently asked questions