Best Mason Jar Vacuum Sealer

A vacuum-sealed jar is not a canned jar

This is the whole safety story, so lead with it. Vacuum sealing a mason jar removes oxygen, which slows the growth of many spoilage organisms and delays fats going rancid. It does not apply heat, and heat is what canning uses to destroy pathogens and their spores. The University of Minnesota Extension's food safety team states it directly: these mason jar vacuum sealers "cannot be used to preserve foods that would otherwise be canned and processed using a heat treatment such as boiling water bath, atmospheric steam canning, or pressure canning."

The Extension goes further and warns that the seal itself may not even be airtight, because the plastisol band on a standard lid is never heated the way it is in real canning. Their bottom line: vacuum sealing a jar "does not result in the same shelf-stable canned food that canning and processing provide." So no matter how satisfying the little pop of the vacuum is, you have not canned anything. You have slowed the clock, not stopped it.

The dangerous mistake is putting a moist, low-acid food into a sealed jar and leaving it in the pantry. You have just created a low-oxygen environment at room temperature, which is the exact condition Clostridium botulinum favors, and botulism toxin is odorless and invisible. That is why the safe use of this tool is narrow and specific, and why the next section is a list, not a paragraph.

So what can you actually put in a vacuum-sealed jar

The University of Minnesota Extension splits it cleanly. Foods that do not need refrigeration to begin with can be vacuum-sealed in a jar and stored on a shelf, because you are only extending an already-stable product. Everything else has to go cold.

Safe for room-temperature jar storage, per the Extension:

• Dried or dehydrated herbs, spices, fruits, and vegetables.
• Dry cereals, grains, and legumes.
• Dried or roasted nuts and seeds.
• Freeze-dried food, crackers, and whole-bean or ground coffee fall in the same dry-goods bucket.

Anything cooked or wet, sauces, soups, broths, salsas, quick-pickled vegetables, cut fruit or vegetables, can be vacuum-sealed in a jar, but the Extension is clear it must then live in the refrigerator or freezer, not the pantry. One meal-prep veteran landed on the same instinct about what jars are even good for, and flagged the freezer trap in the same breath:

This message board thread suggests that placing vacuum-sealed mason jars full of food into the freezer is useless at best and will shatter the jar at worst. I find mason jars to be best for foods that take the shape of their container, such as soups. I also used to use them for overnight oats, before I realized that I need more protein in my breakfasts than oats could provide. They're also very, very cheap compared to most other meal prep containers, but their main downside is that their shape isn't convenient for a lot of meals. I've seen people use mason jars for mason jar salads , homemade instant soups that you just add hot water to , parfaits and desserts, etc.

That is the honest use case. Dry goods on the shelf, wet goods in the cold, and if you do freeze a jar leave real headspace and expect the risk of a crack. The tool is a shelf-life extender for pantry staples, not a substitute for a canner or your refrigerator.

The three ways to seal a jar

Once safety is settled, the hardware splits into three approaches, and only one of them is what most people should buy.

The first is a dedicated cordless jar sealer, the battery-powered pucks all over the marketplace. They are cheap and convenient, but they are also the least proven for holding a vacuum over months, and a dead rechargeable battery turns the whole thing into landfill. They are fine for a jar you will open next week, weak for anything you want to trust next year.

The second, and the right answer for most people, is a countertop vacuum sealer that has an accessory hose port, paired with a jar-sealer attachment. This is the workhorse setup, because the same machine seals your freezer bags and your jars, and the pump is far stronger than a handheld puck. The third is a chamber vacuum sealer, which can pull a vacuum on a whole jar placed inside the chamber, but jar size becomes the limit fast. One chamber owner spelled out exactly how little fits:

Off top of my head, it will fit a few 1/2 pint wide-mouth jars. Depending on what you are putting in the jars - the canning/processing will create all the vacuum you need.

And another chamber user found the ceiling on jar height, which is why the humble attachment path keeps winning for anyone who wants to seal quart jars:

I just checked and Quart jars are too tall & would have to be laid on their side - for liquids, that is big a problem. There is room in the chamber to do 3 pint jars at once or 9 half pints jars at a time. My VP112 has a hose port for a FoodSaver jar attachment but this VP215 does not. So for big jars advantage goes to FoodSaver!

The FoodSaver plus jar-sealer attachment path

This is the setup the owner reports keep circling back to. A vacuum sealer with a hose port, most commonly a FoodSaver, plus a small dome attachment that sits over the canning lid and pulls the air out through the hose. It is cheap, it is repairable, and the attachment outlives the machine. One owner has run this exact arrangement for two decades:

My Foodsaver is about 20 years old. It still works fine, we replaced the metal sealing bars once, a few years ago. I bought a chamber vacuum sealer a year ago, and use that primarily now (it has other functions too, it can infuse oils, etc.) but I still use the Foodsaver mostly for its jar sealer attachment, and when I need to vacuum something long and need the roll instead of precut bags. The chamber vac is much better for sealing liquids without making a mess. How much do they want for it? I forget what I paid for mine, it wasn't that much, but I'm sure I'd be shocked at the prices for new ones.

Notice what she keeps the FoodSaver around for even after buying a fancier chamber sealer: the jar attachment. That is the pattern. The base machine can be modest, because sealing a jar asks very little of the pump compared to sealing a liquid-filled bag. Owners of other machines reach for the same FoodSaver-branded jar accessories, and they cross over between brands:

I got a weston too. You need to get an extra set of foam seal and extra heat resistant type later. Be very careful not to get liquid in the suction hole. It could damage the vacuum. You can use some of the foodsaver accessories like the mason jar sealer and the ziplock attachment.

The attachment itself is simple to use and genuinely works, with one honest caveat that comes up again and again, which is that your food now lives in rigid glass instead of a flexible bag:

You can get an attachment for Mason jars that does work pretty well as long as you don't mind having your meals in jars

For our money the machine to build this around is a FoodSaver with an accessory port, because the attachments are made for it and the bags are in every grocery store. A Nesco or an Anova with a port does the same job if you already own one.

Wide mouth versus regular mouth

Jar-sealer attachments come in two sizes, wide mouth and regular mouth, and you want both if you store a mix of jars. They are not interchangeable, and buying only one is the most common first-order mistake. Regular-mouth heads fit the standard pint and quart jars; wide-mouth heads fit the wide openings that are easier to fill and empty.

Wide-mouth jars are the friendlier choice for most dry goods because you can scoop in and out without a funnel, and owners lean toward them for exactly that reason. One flags the other detail that trips people up, the fill line:

Ball jars wide mouth with sealing lids. There are a couple different kinds on Amazon. For quart jars leave don’t fill past curve at top.

That fill guidance matters more than it sounds. Overfill a jar and the food fouls the sealing surface of the lid, and you get a jar that pops its vacuum a day later. Leave the recommended headspace, keep the rim clean, and the seal holds. Buy the two-head attachment set so a jar's mouth size never dictates what you can store.

Sourcing the hose and adapter is the real headache

Here is the part nobody warns you about. The machine is easy. The tiny hose and the right jar-sealer heads for your specific machine are where people lose an afternoon. Nesco owners in particular hit a wall finding a first-party hose, which is why the accessory-port models get a reputation for being fiddly:

I bought a Nesco VS-12 and though there is a port to attach a hose, it doesn't appear that Nesco sells one. What I would like is a hose and mason jar vacuum sealer attachment. What do folks recommend?

Is there any info anywhere on the canister vacuum accessories?? I can't find approved tubing anywhere for vacuuming mason jars.

The generic "fits any vacuum sealer" hoses on the marketplace are a coin flip, and owners report them simply not sealing:

I've had the same issues and bought the Amazon 'fits any food vacuum' hose, which didn't work. Googled and found this thread.

There is also a durability angle. A poorly fitted third-party adapter can chew up the port on your machine over time, so a bad cheap hose is not just useless, it can cost you the sealer:

I know this is old but got a VS12 for the holidays and so far its been great. Works very well. I wanted to do jars and reusable bags and containers so bought 2 attachments off amazon since i couldnt find anything from nesco either.

The practical fixes owners converge on: buy the jar-sealer attachment made for your machine's brand when one exists, treat tubing as roughly cross-compatible in diameter but verify the fittings, and if your brand bundles the hose inside a canister kit, that kit is often the easiest way to get the part.

I think it is the same size tubing across brands so any make should work. This was my plan when I was going to get one for my nesco. I think foodsaver had one.

If you are buying fresh rather than adapting an old machine, the cleanest route is a sealer whose maker still sells a matching jar attachment. An Anova with the external-attachment option is one such path an owner called out:

I initially bought the Anova Precision, and it worked great. Recently, I saw the Precision Pro on sale and jumped on it. Has the integrated bag roll holder, cutter, and does a double seal by default. Plus the option for using external attachments for mason jars is a nice bonus.

For years, not months: pair the jar with oxygen absorbers

A vacuum pulls most of the air out, but the Extension's own warning about the unheated lid means the seal can be imperfect and can weaken over time. For dry goods you want to keep for a year or more, do not lean on the vacuum alone. Drop a food-grade oxygen absorber into the jar before you seal it. The absorber mops up the residual oxygen and, crucially, keeps mopping it up if the seal leaks a little, which is the difference between grain that is good next season and grain that is stale or buggy.

This is the same principle behind long-term Mylar storage, just in a reusable glass container. If your real goal is multi-year storage of staples like rice, beans, and rolled oats, read the pairing logic in our guide to Mylar bags and oxygen absorbers, size the absorber to the jar volume, and treat the vacuum seal as the first line of defense rather than the only one.

For everyday freezer and fridge sealing of bags, which is a different job than pantry jars, our guide to the best vacuum sealer for sous vide and freezer storage covers the machines that handle wet food and bulk bagging.

So what should you buy?

Buy a vacuum sealer that has an accessory hose port, then add a jar-sealer attachment set with both a wide-mouth and a regular-mouth head. The FoodSaver machine is the safe default because the attachments are made for it and the supplies are everywhere, but a ported Nesco or Anova you already own will do the same work.

Skip the standalone cordless jar puck if you care about long storage, and skip the idea that any of this replaces canning. It does not. Keep the tool in its lane: dry goods on the shelf, wet goods in the cold, and an oxygen absorber in the jar when you want the contents to last for years.

Do that and a jar of freeze-dried fruit, whole coffee beans, or dehydrated garden herbs will hold far longer than it would with a loose lid, safely, and for the cost of a small attachment rather than a second machine.