The best replacement for canning is freezing.

The best alternatives to canning are rated as following:
★★★★★  freezing
★★★  freezing tomatoes
★★  jarring
★★  bottling
★★  pickling salt
★★  pickling
★★  freezing peaches
★  freezing vegetables
★  pressure canning
★  vacuum sealing
★  freezing green beans
★  dehydrating
★  canning
★  dehydration
★  water bath
★  nlrb
★  water bath canning
  hot water bath
  fermentation
  drying
  freezing potatoes
  pressure cooking
  preserving

Your alternative for canning is not listed? Suggest!
Speaking about canning, one probably shouldn't forget about oil.

Other search terms related to canning and their ratings are:
★★★★★ oil
You have in mind a companion for canning and it is not yet here? Propose!



Google Trends

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canning
freezing
freezing tomatoes