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ONCE FOR ALL Mandoline Slicer Review: Safe Upright Slicer With a Narrow Chute

ONCE FOR ALL's safe mandoline is an upright slicer: food drops into a chute, a plunger pushes it down through a hidden blade, and two dials behind it set the cut. It slices, julienne-cuts, makes matchsticks and dices, all without swapping a blade, and it folds flat for storage. It is far safer than a flat mandoline. The trade-off is capacity, because everything has to fit the chute, and the cleaning that comes with a blade you cannot take out.

By Whimsical Pris, Kitchen Editor Published September 27, 2026 Updated September 27, 2026
4.3Our score
ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green) ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 2 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 3 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 4 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 5 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 6 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 7 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 8 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 9 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 10 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 11 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 12 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 13 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 14 ONCE FOR ALL Safe Mandoline Slicer, Multi Vegetable Chopper, Potato Slicer for Kitchen, 4 Modes 100+ Presets Adjustable Thickness, French Fry Cutter (5 in 1 Green), view 15
Product gallery, 15 images
$35.99 Check price on Amazon

Prices shown were correct on September 27, 2026 and change frequently.

TL;DRThe Short Answer: Is the ONCE FOR ALL Safe Mandoline Slicer Worth It?

Your fingers never go near the blade, which is the reason to choose this over a flat mandoline, but the price is a small chute and a slicer you cannot take apart to clean. Anything wider than the chute must be cut down first, and dicing takes two passes. Within those limits it is quick and consistent: 420 stainless blades cut slices, julienne, matchsticks and dice from 0.1 to 8 mm, suction feet hold it steady, and it folds flat.

NoFussDeal rates the ONCE FOR ALL Safe Mandoline Slicer 4.3 out of 5 at $35.99. Last updated September 27, 2026.

Key Facts

Product Dimensions
11"L x 4.7"W x 14"H
Material
Acrylonitrile Butadiene Styrene, Stainless Steel
Color
Green
Item Weight
2 pounds
Brand
ONCE FOR ALL
Recommended Uses For Product
Potatoes, Sweet Potato, French Fry, Onion, Cucumber, Zucchini, Celery, Lemon, Carrot, Apple,Vegetable, Fruits,Food

What Stands Out

  1. Food goes into a chute and a plunger pushes it through, so hands never touch the blade.
  2. Four cuts, slices, julienne, matchsticks and dice, with no blade to change.
  3. Adjustable thickness from 0.1 to 8 mm, set by two dials on the back.
  4. 420 stainless steel blades, with a safety lock on the plunger.
  5. Folds down for storage and comes with a cleaning brush.
  6. Dishwasher safe, BPA-free and backed by a 24-month warranty from ONCE FOR ALL.

Strengths and Drawbacks

What works

  • Hands never touch the blade, so it is safe enough for older children to help.
  • Slices, julienne, matchsticks and dice without changing blades.
  • Thickness adjusts from 0.1 to 8 mm and slices come out consistent.
  • Suction feet keep it steady on the counter.
  • Folds down for storage and comes with a cleaning brush.
  • Quick for everyday vegetables, fries and chips.

What does not

  • The chute is small, so onions, large potatoes and wide vegetables must be cut down first.
  • It cannot be taken apart, and cleaning around the fixed blades is a chore for some.
  • The two-dial blade system takes some learning, and the manual is worth reading.
  • Dicing takes two passes, slicing first and then reloading.
  • The pusher can stick at the bottom, and big batches are tiring.
  • Not suited to cheese, frozen or soft, sticky foods.

Features in Depth

01

Chute and Plunger Safety

Design Chute and plunger, hidden blade Lock Twist-lock plunger Base Suction feet

Safety is the reason to buy this slicer, and it is the aspect that draws the most praise with almost no dissent. Food goes into a vertical chute, and a plunger pushes it down through a blade hidden inside the body. Your hand holds the plunger handle, so it never comes near the edge, and there is no need for cut-resistant gloves or for sacrificing the last inch of a vegetable. The plunger locks with a twist, so it cannot drop into the chute during storage; one owner took a while to discover that it must be twisted to release. Owners describe it as safe enough for older children, and one lets their 12 and 13-year-olds help with meal prep. Suction feet on the base hold the slicer to the counter, and one owner describes them as just right: firm while slicing, easy to lift afterward. The chute does have a cost. Anything wider than its opening must be cut down first, which means a knife comes out anyway for whole onions or large potatoes. And one owner finds the pusher can jam at the bottom of the slicer, needing a few tries to dislodge before the next batch.

$35.99 4.3/5 Check price
02

Four Cuts and Thickness Dials

Cuts Slice, julienne, matchstick, dice Thickness 0.1 to 8 mm Blades 420 stainless steel

The slicer offers four cuts, slices, julienne, matchsticks and dice, without changing blades. Two dials on the back control two sets of blades: lower both and you get full slices, raise one and you get wider strips, raise both and you get fine julienne. Thickness is adjustable from 0.1 to 8 mm, which ONCE FOR ALL describes as more than 100 preset positions. In practice that range covers everything from translucent potato chips to thick-cut fries, and the consistency is the real benefit: every slice is the same, so a tray of chips bakes evenly and a dehydrator batch finishes together, as one owner preserving a garden harvest points out. The system has a learning curve. One owner found the dials confusing even after watching the seller's video, another advises reading the manual carefully, and adjustability is a mixed point overall. Dicing is slower than it sounds, because it takes two passes: slice first, then reload the slices into the chute and cut again, which is one of the reasons one owner is thinking of returning it. Once the settings are understood, the everyday cuts are quick, and one owner uses it several times a week for hash-brown cubes.

$35.99 4.3/5 Check price
03

Chute Size and Capacity

Dimensions 11 x 4.7 x 14 inches Weight 2 pounds Storage Collapsible

Size is the one aspect that draws mostly complaints. The chute is small, and whole onions, large potatoes, big cucumbers and many other vegetables will not fit without trimming. One owner knew this before buying and still finds it limiting; another, who eats a lot of vegetables, finds it a bit too small and needs several loads for one portion. It works best with produce that is naturally narrow or easy to halve, such as carrots, celery, zucchini, cucumbers, apples and medium potatoes. Batch size matters too. Each chute load is modest, so a large batch means many refills, and one owner warns that doing enough potatoes for a big batch of hash browns will tire your arm; switching hands helps. The unit itself measures 11 by 4.7 by 14 inches and weighs 2 pounds, and it folds down for storage, which one owner says lets it fit in a drawer, though another still finds it somewhat bulky. It is a one or two person slicer for everyday vegetables rather than a tool for processing a sack of potatoes.

$35.99 4.3/5 Check price
04

Cleaning, Materials and Warranty

Cleaning Dishwasher safe, brush included Materials ABS plastic, stainless steel Warranty 24 months

Ease of cleaning divides owners almost evenly, and the reason is structural. The blades are built into the slicer and it cannot be disassembled, so food caught around them has to be flushed or brushed out rather than washed off a loose blade. Some owners find that quick, especially straight after use; others call it a pain. The included brush is well liked for clearing vegetable debris, and ONCE FOR ALL rates the slicer as dishwasher safe. Rinsing it under the tap as soon as you finish, before starch and juice dry on, makes the biggest difference, and starchy potato is the food most likely to cling. The body is ABS plastic and the blades are 420 stainless steel, a hardened grade used for cutting edges, and the plastic parts are BPA-free. It is not made for everything: one owner advises keeping it to firm produce and avoiding sticky foods such as cheese, and anything frozen. ONCE FOR ALL covers each slicer with a 24-month warranty, which is worth registering given that the plastic mechanism takes all the force of the plunger.

$35.99 4.3/5 Check price

How We Scored It

Based on
The manufacturer's published specifications and the product's live Amazon listing.
Owner rating
4.4 out of 5 on Amazon, recorded September 27, 2026
How we score
We score each thing that comes up most in owner feedback on the ONCE FOR ALL Safe Mandoline Slicer. Eight things come up most in owner feedback: four draw praise, three split opinion and one draws mostly complaints. Its ratings average 4.4 stars (70% five stars, 16% four, 7% three and 7% one or two), so every score starts at 88, that average on a 100 point scale. Where opinion is split, we take off 6. Where it draws mostly complaints, we take off 12. Then we read eight owner reviews in full, including the critical ones, and move the score up to 5 points either way depending on how the owners who mention it rated the product. Our overall score starts from the same 4.4 star average and loses 0.1 for each thing that draws mostly complaints, with 0.1 more when at least a tenth of ratings are one star, never more than 0.3 in all. Here that takes off 0.1, which gives 4.3. Read our editorial standards

Functionality

None of the eight owner reviews we read mention it. Score 88: its 4.4 star average on a 100 point scale.

88Positive

Safety

None of the eight owner reviews we read mention it. Score 88: its 4.4 star average on a 100 point scale.

88Positive

Slice Performance

Seven of the eight owner reviews we read mention it. Six gave the product four or five stars and one gave it three or fewer. 14% of all ratings are three stars or fewer, which is where complaints like this usually sit. Score 82: we started at 88 and took off 6 because opinion is split.

82Mixed

Adjustability

One of the eight owner reviews we read mentions it, and that owner gave the product four or five stars, so the complaints come from the wider group of buyers. None of the reviews we read say what goes wrong, so this score rests on the buyer ratings. 14% of all ratings are three stars or fewer, which is where complaints like this usually sit. Score 82: we started at 88 and took off 6 because opinio…

Read the full note (411 characters)

One of the eight owner reviews we read mentions it, and that owner gave the product four or five stars, so the complaints come from the wider group of buyers. None of the reviews we read say what goes wrong, so this score rests on the buyer ratings. 14% of all ratings are three stars or fewer, which is where complaints like this usually sit. Score 82: we started at 88 and took off 6 because opinion is split.

82Mixed

Ease Of Cleaning

ONCE FOR ALL lists the product care instructions as Dishwasher Safe. Five of the eight owner reviews we read mention it. Four gave the product four or five stars and one gave it three or fewer. 14% of all ratings are three stars or fewer, which is where complaints like this usually sit. Score 82: we started at 88 and took off 6 because opinion is split.

82Mixed

Size

ONCE FOR ALL lists the product dimensions as 11"L x 4.7"W x 14"H. Seven of the eight owner reviews we read mention it. Six gave the product four or five stars and one gave it three or fewer. 14% of all ratings are three stars or fewer, which is where complaints like this usually sit. Score 76: we started at 88 and took off 12 because it draws mostly complaints.

76Needs Improvement

Owner Satisfaction

70% of ratings are five stars and 16% are four. 7% are three stars and 7% are one or two. The spread skews positive, but enough ratings sit low that the drawbacks below are worth reading. One of the eight owner reviews we read gave it three stars or fewer. We look for the critical ones on purpose. Score 88: its 4.4 star average on a 100 point scale.

88Positive

Specifications

Size and weight

Product Dimensions
11"L x 4.7"W x 14"H
Item Weight
2 pounds

Materials and warranty

Material
Acrylonitrile Butadiene Styrene, Stainless Steel
Color
Green

Other specifications

Brand
ONCE FOR ALL
Recommended Uses For Product
Potatoes, Sweet Potato, French Fry, Onion, Cucumber, Zucchini, Celery, Lemon, Carrot, Apple,Vegetable, Fruits,Food

What Buyers Say

Safety draws the most praise, with speed, sharpness and the range of cuts close behind; owners like that children can use it and that slices come out even. Several things split opinion. The chute is the biggest complaint, too small for whole onions, large potatoes and many vegetables. Cleaning divides owners almost evenly, and slice quality and the thickness settings are mixed, with a learning curve on the dials and a plunger that can stick.

Based on 17,437 Amazon customer ratings, averaging 4.4 out of 5, recorded 27 September 2026. See the reviews on Amazon

5 stars 70%
4 stars 16%
3 stars 7%
2 stars 3%
1 stars 4%
★★★★★

Loving this tool for easy meal prep

This is easily one of my favorite kitchen accessories. I use it several times a week, particularly for making hash brown cubes from potatoes, and it performs beautifully every time. The blad… Read it on Amazon
Joe · November 30, 2024 · Verified
★★★★★

Performs much better than I expected. Read the manual carefully-slight learning curve on settings.

Pros: Cuts fast and easily, wide range of adjustments for thickness, easily handles fairly large potatoes and other veggies. Blades are sharp and very well protected so it is safe even for k… Read it on Amazon
TurtleWax · February 22, 2025 · Verified
★★★★★

Well engineered product, works well, is safe and easy to use

I admire well engineered products and this is a well engineered product. I purchased this mandolin to make baked (purple - Stokes) sweet potato chips; I used to hand slice the potatos. Tradi… Read it on Amazon
IamKen · June 24, 2021 · Verified
★★★★★

Buy it

My son decided he’d be farmer Joe this summer and grow a garden. We have a lot of produce. Which on one hand is great since we don’t have to worry about the poo poo parasite currently in gro… Read it on Amazon
AC · July 24, 2026 · Verified
★★★★★

Save your fingers buy this one

I can finally get the cuts I want and keep my fingers intact! Mandolines are one of the most dangerous kitchen items you can have and I learned the hard way why they are so dangerous. I like… Read it on Amazon
paiz2kids · August 8, 2026 · Verified
★★★★★

Should have purchased one years ago!

This item works great, makes perfect slices, love that it folds down and fits in a drawer.
Linda B. · August 26, 2026 · Verified

Setting It Up

  1. Read the dial guide

    Before the first use, read the manual's explanation of the two dials. Lowering both gives flat slices, raising one gives wider strips and raising both gives julienne.

  2. Unfold and fix it down

    Open the slicer, set it on a clean, smooth counter and press down so the suction feet grip.

  3. Set the thickness and cut

    Choose the thickness between 0.1 and 8 mm and set the dials for the cut you want.

  4. Trim food to fit the chute

    Halve or quarter anything wider than the chute opening, then drop it in. Firm produce works best.

  5. Release the plunger and press

    Twist the plunger to unlock it, then press down firmly and steadily. For dice, slice first, then reload the slices and cut again.

Common Questions

Is the ONCE FOR ALL mandoline really safe?

It is much safer than a flat mandoline. Food is pushed through a hidden blade by a plunger, so your hand never approaches the edge. Keep fingers out of the chute and blade area when cleaning.

What cuts can it make?

Slices, julienne, matchsticks and dice, with thickness from 0.1 to 8 mm. Dicing takes two passes: slice first, then reload the slices and cut again.

Will a whole onion or potato fit?

Often not. The chute is small, so large onions, potatoes and wide vegetables need halving or quartering first.

How do the two dials work?

Each dial raises or lowers one set of blades. Both down gives flat slices, one up gives wider strips and both up gives julienne. Read the manual before the first use.

Is it dishwasher safe?

ONCE FOR ALL rates it as dishwasher safe. It cannot be taken apart, so rinse it straight after use and use the included brush around the blades.

Does it come with a warranty?

ONCE FOR ALL provides a 24-month warranty on each slicer.

On Video

4 videos

Once For All Mandoline Slicer Plus Review — Safer, Faster, Thicker Slicing!

Dr. J's Kitchen
All videos
  1. Once For All Mandoline Slicer Plus Review — Safer, Faster, Thicker Slicing! Dr. J's Kitchen
  2. ONCE FOR ALL Mandoline Slicer Review & How To Use Video #onceforall #mandoline  #mandolineslicer Stevie Cooks
  3. How to use ONCE FOR ALL Rapid-prep Mandoline Vegetable Slicer Connice Ye
  4. ONCE FOR ALL Safe Mandoline Slicer upgrade Large Vegetable Cutter, Strips Julienne Dicer Daily Deal Daily Deal Shop

The Verdict

4.3Out of 5

If flat mandolines have always made you nervous, this upright slicer is a real improvement. Your hand stays on a plunger well away from the blade, suction feet keep it steady, and two dials give slices, strips, matchsticks and dice across a 0.1 to 8 mm range without swapping parts. The results are consistent, which suits chips, fries and dehydrating, and it is safe enough for older children to help. The compromises are real, though. The chute is small, so larger vegetables need cutting down first, dicing takes two passes, and the blades cannot be removed, which makes cleaning a chore for some owners. The dial system needs a read of the manual, and the pusher can stick. For one or two people slicing everyday vegetables, it is a safe, capable tool; for large batches or whole onions, it is slower than it looks.

Who should buy it

  • Cooks wary of flat mandolines
  • Anyone who wants even fries, hash browns or chips without risking their fingers.
  • Home cooks who dehydrate or bake vegetable chips and need consistent thickness.
  • Families who want older children to help with vegetable prep.

Who should skip it

  • Cooks who want to slice whole onions or large potatoes without trimming them first.
  • Anyone who processes big batches and wants speed above all.
  • Buyers who want a slicer that comes apart fully for cleaning.

A genuinely safer mandoline for everyday vegetables, as long as you can live with a small chute and a brush-and-rinse cleanup.

Check price on Amazon

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