Canning Primer

Put up your own food, safely, from your first jar

Home canning, made simple.

Home canning and food preserving for absolute beginners, with safety first the whole way. We cover the two methods that matter most: water-bath canning for high-acid foods like jams, fruit, and pickles, and pressure canning for low-acid foods like plain vegetables, beans, and meats. Start small with a batch of jam or a jar of pickles, learn how a proper seal keeps food shelf-stable, and lean on tested, up-to-date recipes for the exact times. Done that way, putting up your own food is safe, satisfying, and well within reach.

Getting StartedEquipment & JarsWater-Bath CanningPressure CanningJams, Jellies & PicklesSafety & Storage

Canning Altitude Adjustment Calculator

Adjust a tested recipe's water-bath time or pressure canner psi for your altitude, using exact USDA/NCHFP tables.

Add 0 min for your altitude: process for 20 min total instead of the recipe's 20 min.

This adjusts a tested recipe's time for your elevation; it does not replace one. Only use this for high-acid foods that are safe to water-bath can in the first place.

Produce to Jar Yield Calculator

Estimate how many jars a batch of produce will fill, or how many pounds to buy for a jar count, using NCHFP averages.

All free tools →

Latest guides

50 guides
Safety & Storage

Botulism and Home Canning: What You Must Know

Learn how botulism risk in home canning works, which foods require a pressure canner, and the simple rules that keep every jar on your shelf safe.

July 4, 2026
Pressure Canning

Venting, Pressurizing, and Cooling a Pressure Canner Safely

Learn how to vent a pressure canner, build and hold pressure correctly, and cool it safely with this step-by-step guide for beginners.

July 4, 2026
Jams, Jellies & Pickles

How to Make and Can Relish and Chutney

Learn how to safely water-bath can relish and chutney using tested recipes, the right vinegar ratio, and proper processing times.

July 3, 2026
Safety & Storage

Labeling and Tracking Your Canned Pantry

Learn how to label home canned jars correctly, organize your canning pantry, and use a simple inventory log to rotate stock safely.

July 3, 2026
Water-Bath Canning

Hot Pack vs Raw Pack: What's the Difference?

Learn the difference between hot pack and raw pack canning, when each is used, and why following your tested recipe's method matters for safe results.

July 2, 2026
Jams, Jellies & Pickles

How to Make and Can Jam (A Beginner's Guide)

Learn how to make jam for canning step by step. Beginner-friendly guidance on pectin, gel point, headspace, and safe water-bath processing for your first batch.

July 2, 2026
Getting Started

A Beginner's First Canning Project: Start Here

Not sure what to can first? Start with high-acid water-bath projects like jam, pickles, or applesauce, forgiving, safe, and satisfying for beginners.

July 1, 2026
Equipment & Jars

Dial Gauge vs Weighted Gauge Pressure Canners

Learn how dial gauge and weighted gauge pressure canners differ, when each type suits your needs, and how altitude affects which gauge to choose.

July 1, 2026
Pressure Canning

How to Pressure Can: A Beginner's Step-by-Step Guide

Learn how to pressure can safely with this beginner step-by-step guide. Covers venting, pressurizing, depressurization, and why tested recipes matter.

June 30, 2026
Safety & Storage

Why You Should Only Use Tested Canning Recipes

Tested canning recipes are lab-validated for safe acidity and heat penetration. Here's what that means and where to find reliable sources.

June 30, 2026
Pressure Canning

Reading Pressure and Processing Times the Right Way

Learn how to read pressure canning PSI and processing times from tested recipes, and why both vary by jar size, canner type, food, and altitude.

June 29, 2026
Jams, Jellies & Pickles

How to Can Apple Butter and Fruit Spreads

Learn how to safely can apple butter and fruit spreads at home using water-bath canning, tested recipes, and proper headspace.

June 28, 2026
Equipment & Jars

How to Prepare and Sterilize Canning Jars

Learn when and how to sterilize canning jars, how to wash and keep them hot, and what to inspect before you fill them.

June 28, 2026
Water-Bath Canning

Checking Seals After Water-Bath Canning

Learn how to check canning seals after water-bath canning, what a good seal looks and sounds like, and what to do if a lid fails.

June 27, 2026
Water-Bath Canning

How to Water-Bath Can: A Step-by-Step Guide for Beginners

Learn how to water-bath can safely with this beginner-friendly guide covering equipment, the full canning process, altitude adjustment, and seal checks.

June 27, 2026
Getting Started

Canning Terms Every Beginner Should Know

A plain-language glossary of canning terms for beginners: headspace, siphoning, water-bath vs pressure, hot pack, seal, altitude adjustment, and more.

June 26, 2026
Jams, Jellies & Pickles

Pickling Salt vs Table Salt vs Kosher Salt: What to Use for Canning

Learn which salt is safe for canning and pickling, why iodized table salt causes cloudy brine, and how to substitute kosher salt with volume conversion.

June 26, 2026
Equipment & Jars

Canning Equipment for Beginners: What You Actually Need

A practical canning supplies list for beginners: the essential tools, what you can improvise, and when a pressure canner is non-negotiable.

June 25, 2026
Safety & Storage

How to Store Canned Goods Properly

Learn how to store home canned jars safely: remove screw bands, choose cool dark dry storage, label for rotation, and inspect seals before use.

June 25, 2026
Water-Bath Canning

How to Can Salsa Using a Tested Recipe

Learn how to can salsa safely using a tested recipe. Understand why the acid-to-vegetable ratio matters and how water-bath canning keeps salsa shelf-stable.

June 24, 2026
Jams, Jellies & Pickles

How to Make Low-Sugar or No-Sugar Jam

Learn how to safely can low-sugar and no-sugar jams using special pectin, tested recipes, and the right technique for a proper set.

June 24, 2026
Equipment & Jars

Essential Canning Tools: Jar Lifter, Funnel, and More

A practical guide to the essential canning tools every beginner needs, from jar lifters and funnels to headspace gauges and bubble removers.

June 23, 2026
Getting Started

Home Canning for Beginners: How to Get Started Safely

Learn how home canning works, which method matches your food, and what equipment you need to preserve safely without the overwhelm.

June 23, 2026
Pressure Canning

Can You Can Meat at Home? Pressure Canning Basics

Yes, you can safely can meat at home with a pressure canner. Learn how to pressure can chicken, beef, and other meats using tested USDA recipes.

June 22, 2026
Pressure Canning

How to Pressure Can Soups and Stocks

Learn how to safely pressure can homemade soups, broths, and stocks using tested USDA guidelines, the only safe method for these low-acid foods.

June 21, 2026
Jams, Jellies & Pickles

Refrigerator Pickles vs Canned Pickles

Refrigerator pickles are quick and crisp but need refrigeration. Canned pickles are shelf-stable but require a tested water-bath recipe.

June 21, 2026
Water-Bath Canning

How to Can Fruit in Syrup or Juice

Learn how to can fruit safely at home using water-bath canning. Covers syrup types, hot pack vs. raw pack, and step-by-step instructions for beginners.

June 20, 2026
Safety & Storage

How Long Does Home-Canned Food Last?

Learn how long home-canned food stays safe and at peak quality, plus storage tips and signs that a jar should be discarded.

June 19, 2026
Water-Bath Canning

How to Can Applesauce at Home

Learn how to safely can smooth applesauce at home using a tested water-bath recipe. Covers apple selection, hot-pack method, headspace, and processing.

June 19, 2026
Getting Started

Common Canning Mistakes Beginners Make (and How to Avoid Them)

Learn the most common canning mistakes beginners make, from using the wrong method for low-acid foods to skipping headspace, and how to can safely.

June 18, 2026
Getting Started

Is Home Canning Safe? What Every Beginner Should Know

Home canning is safe when you follow tested methods. Learn the key rules every beginner needs to know to can food safely and avoid common mistakes.

June 17, 2026
Equipment & Jars

Water-Bath Canners and Stockpot Alternatives

Learn what a water-bath canner actually does, the two requirements any pot must meet, and how to improvise with gear you already own—safely.

June 17, 2026
Safety & Storage

Signs of Spoiled Canned Food (When to Throw It Out)

Learn the warning signs of spoiled home-canned food, from bulging lids to off odors, and how to dispose of suspect jars safely. When in doubt, throw it out.

June 16, 2026
Jams, Jellies & Pickles

How to Make Canned Pickles (Brining Basics)

Learn how to can pickles at home with a safe vinegar brine. Covers brine ratios, the fresh-pack method, crisp pickle tips, and water-bath processing basics.

June 15, 2026
Water-Bath Canning

How to Adjust Canning for Your Altitude

Altitude affects canning safety. Learn why, how to find your elevation bracket, and whether to add processing time or increase PSI for your canning method.

June 14, 2026
Pressure Canning

How to Pressure Can Beans and Legumes

Learn how to can dried beans at home safely. This beginner's guide covers soaking, pre-cooking, packing, and pressure canning beans the right way.

June 14, 2026
Equipment & Jars

Do You Need a Pressure Canner? Pressure Canner vs Pressure Cooker

Find out if you need a pressure canner, how it differs from a pressure cooker, and when a water-bath canner is enough for safe home preserving.

June 13, 2026
Getting Started

How Does Canning Preserve Food? The Science of the Seal

Learn how canning preserves food through heat processing and vacuum seals, and why both steps matter for safe, shelf-stable jars.

June 12, 2026
Safety & Storage

How to Tell If a Canning Seal Failed

Learn three simple checks to confirm a good canning seal, what to do with an unsealed jar, and why band removal matters for long-term safety.

June 12, 2026
Jams, Jellies & Pickles

Jam vs Jelly vs Preserves: What's the Difference?

Learn the real differences between jam, jelly, and preserves — plus marmalade, conserves, and fruit butter — so you can choose and make the right spread.

June 11, 2026
Water-Bath Canning

How to Can Tomatoes Safely (and Why You Add Acid)

Why home-canned tomatoes require added acid, how to add bottled lemon juice or citric acid correctly, and a step-by-step overview of the safe canning process.

June 10, 2026
Pressure Canning

How to Pressure Can Vegetables

Learn how to pressure can vegetables safely at home. Covers which vegetables to can, hot vs raw pack, the step-by-step process, and why tested recipes matter.

June 10, 2026
Equipment & Jars

Canning Lids and Bands: Why You Replace Lids Every Time

Learn how the two-piece canning lid system works, why flat lids must be replaced each batch, and how bands seal, vent, and store safely.

June 9, 2026
Getting Started

Why Acidity Matters in Canning (High-Acid vs Low-Acid Foods)

Learn why the pH 4.6 dividing line is the most important number in home canning, how to classify foods, and which method keeps your jars safe.

June 8, 2026
Jams, Jellies & Pickles

How Pectin Works: Getting Your Jam to Set

Learn how pectin, acid, and sugar work together to gel jam, which fruits need added pectin, and how to fix a batch that won't set.

June 7, 2026
Safety & Storage

What Is Headspace and Why Does It Matter?

Headspace is the gap between your food and the jar lid. Get it wrong and your seal fails. Here's what it is, why it matters, and how to measure it correctly.

June 7, 2026
Pressure Canning

Why You Can't Water-Bath Can Low-Acid Foods

Learn why low-acid foods like vegetables, beans, and meats must be pressure canned—and why boiling water alone can never make them safe to store on the shelf.

June 6, 2026
Equipment & Jars

Mason Jar Sizes Explained (and When to Use Each)

Learn which mason jar size to use for canning jams, pickles, tomatoes, and more — plus why matching jar size to your tested recipe is a food-safety essential.

June 5, 2026
Water-Bath Canning

What Foods Can You Water-Bath Can?

Learn which foods are safe for water-bath canning, why acidity is the key factor, and which low-acid foods must always be pressure canned.

June 5, 2026
Getting Started

Water-Bath vs Pressure Canning: Which Method Do You Need?

Learn which canning method is right for your food. Water-bath for high-acid jams and pickles; pressure canning for low-acid vegetables, meats, and beans.

June 4, 2026

Browse by topic

Getting StartedBegin here. Home canning is the simple craft of sealing food in jars so it keeps on the shelf for months. As a hot jar cools, the lid pulls down and forms a vacuum seal that locks spoilage out. There are two methods, and which one you use comes down to acidity: water-bath canning for high-acid foods like jams, fruit, and pickles, and pressure canning for low-acid foods like plain vegetables and meats. The golden rule for every batch is to follow a current, tested recipe. Done that way, canning is friendly and very doable for a first-timer.Equipment & JarsWhat you actually need to start, without overbuying. For high-acid foods you can begin with a deep pot and a rack, or a dedicated water-bath canner. You will want canning jars, screw bands you can reuse, and fresh lids every single time, since a used lid may not reseal. A jar lifter and a wide funnel make the work cleaner and safer. We cover common Mason jar sizes, half-pint to quart, and explain why low-acid foods need a pressure canner, not a boiling-water pot, to reach a safe temperature.Water-Bath CanningThe method for high-acid foods: jams and jellies, most fruit, pickles, and tomatoes or salsa made from a tested recipe with added acid. The flow is straightforward. Prep and warm your jars, fill them to the headspace the recipe calls for, wipe the rims, apply lids and bands, then process in fully boiling water for the time the tested recipe gives. Lift the jars out, let them cool undisturbed, and check the seals the next day. If you live at higher elevation, you will need to add processing time, so always check the altitude adjustment.Pressure CanningThe only safe method for low-acid foods: plain vegetables, beans, meats, poultry, seafood, and stocks and soups. These foods are not acidic enough to stop the bacteria that cause botulism, and boiling water simply does not get hot enough to make them safe. A pressure canner reaches the higher temperature that does. We explain dial-gauge versus weighted-gauge basics, why your gauge and altitude both affect the pressure you use, and why following the tested time and pressure exactly is non-negotiable here.Jams, Jellies & PicklesThe friendliest projects to start with, and the ones most people try first. Jams and jellies set when the natural or added pectin, sugar, and acid come together, which is why measuring matters more than improvising. Pickles can be quick refrigerator versions that keep a few weeks in the fridge, or canned ones processed in a water bath for the shelf. We walk through simple brine basics and, as always, point you to tested recipes so your sweet and tangy first batches come out safe and reliable.Safety & StorageThe non-negotiables that keep home-canned food safe. Leave the right headspace, slide a tool down the side to release trapped air bubbles, and wipe rims clean before sealing. After processing, check that each lid sealed; anything that did not seal goes in the fridge to eat soon. Label and date every jar, store them somewhere cool and dark, and know the signs of spoilage, such as a bulging lid, leaking, off smells, or mold. When in doubt, throw it out, and never taste a suspect jar to find out.