3 Best Small Air Fryers in the UK (2026)
Small air fryers are easy to find. Ones that genuinely fit a small kitchen are harder, because the basket size tells you very little about width, depth or how much space the appliance needs around it while it’s cooking. I’ve picked three compact models for one- or two-person households and checked each one against the manufacturer’s UK documentation.
Quick answer
The Ninja CRISPi FN101UK is our premium overall pick. It comes with 1.4L and 3.8L glass containers, so you can cook a single portion or a fuller meal, and it has the smallest body of the three. The catch is that there’s no temperature setting: you choose one of four modes and set the time.
The Instant Vortex 4-in-1 3.8L is the simpler everyday choice. It’s a conventional drawer air fryer with four programmes, adjustable time and temperature, and the narrowest front of the three.
The COSORI Lite Smart 3.8L is the one to get if you want app control. It reaches 230°C, the highest here, and the VeSync app lets you monitor and adjust cooking from your phone, although you still have to press start on the air fryer itself.
Our recommendations are based on UK manufacturer specifications and manuals, capacity, dimensions, cooking functions, cleaning, guarantee terms and current UK availability, along with our judgement of how practical each model is in a smaller kitchen. The scores are editorial assessments, not results from hands-on or laboratory testing.
At a glance: the best small air fryers
| Model | Best for | Capacity | Size (H × W × D) | Power | Temperature control | Guarantee | Score |
|---|---|---|---|---|---|---|---|
| 1. Ninja CRISPi FN101UK | Best Premium Small Air Fryer Overall | 1.4L + 3.8L | 29.3 × 29.7 × 24.8cm | 1,700W | None (mode-based) | 1 year, 2 with registration | 9.4/10 |
| 2. Instant Vortex 4-in-1 3.8L | Best Small Air Fryer for Everyday Use | 3.8L | 28 × 25.7 × 33.1cm* | 1,400–1,650W | 82–205°C (Reheat 49–182°C) | 1 year | 9.1/10 |
| 3. COSORI Lite Smart 3.8L | Best Smart Small Air Fryer | 3.8L | 32.5 × 27 × 37.5cm** | 1,500W | 75–230°C | 2 years | 8.9/10 |
*Instant’s manual lists the Vortex as 25.7cm deep × 33.1cm wide × 28cm high. Its product photos show a body that’s narrower than it is tall, so we’ve treated the 25.7cm side as the front. If width is tight, it’s worth measuring one in store.
**The COSORI’s depth includes the handle and rear air-outlet spacer. The body alone is 27cm deep.
How we scored them: Our scores reflect each air fryer’s suitability for a smaller kitchen, considering footprint, usable capacity, cooking versatility, controls, cleaning, specification strength and overall value. These are editorial assessments based on manufacturer information, not hands-on or laboratory test results.
What counts as a small air fryer?
Capacity alone doesn’t tell you whether an air fryer will suit a small kitchen. A 2L model can have a modest basket but a bulky body, while a well-designed 3.8L air fryer gives you more cooking space without taking over the worktop. For this guide, ‘small’ means a compact footprint, sensible storage and enough capacity for one or two people.
That’s why two 3.8L drawer models sit alongside the modular Ninja CRISPi. They aren’t the smallest air fryers sold in the UK, but they’re big enough for a proper two-person meal without the bulk of a 5L-plus model. If you regularly cook for more people, our guide to single vs dual air fryers is a better place to start.
How much space do they really need?
Each manufacturer also asks for a gap around the appliance while it’s cooking, and that changes which one is easiest to fit.
| Model | Worktop footprint (W × D) | Height | Clearance in the manual | Power cord |
|---|---|---|---|---|
| Ninja CRISPi | 29.7 × 24.8cm | 29.3cm | 15cm on all sides and above | 0.89m (retailer listing) |
| Instant Vortex 3.8L | 25.7 × 33.1cm | 28cm | No figure; keep it away from walls and other appliances | 70cm |
| COSORI Lite Smart | 27 × 37.5cm (incl. handle and spacer) | 32.5cm | 13cm behind and above | Not published |
The CRISPi has the smallest body by footprint, but Ninja’s owner’s guide asks for 15cm of clear space above and on every side. On an open stretch of worktop that’s easy. Squeezed into a corner, it can need more room than its size suggests. On the plus side, there’s no drawer to pull out, because you lift the PowerPod off the top.
The COSORI needs 13cm behind and above, plus room in front to slide the basket out. Instant’s English manual doesn’t give a figure, but it does say not to put the Vortex against a wall or another appliance while it’s cooking. The Instant’s 70cm cord is also on the short side, so it needs to sit fairly close to a socket.
If it’s going under wall cupboards, check the height as well. Going by their manuals, the CRISPi needs about 44cm of clear height (29.3cm plus 15cm) and the COSORI about 46cm (32.5cm plus 13cm). These gaps are there because of heat and steam from the vents, and our guide on whether air fryers are safe covers placement in more detail.
1. Ninja CRISPi FN101UK: Best Premium Small Air Fryer Overall
Score: 9.4/10
The Ninja CRISPi doesn’t work like a normal drawer air fryer. A 1,700W PowerPod clips onto either a 1.4L or a 3.8L glass container, so you can cook a single portion in the small one and a fuller meal in the large one. That flexibility is the main reason it leads this shortlist.
It has four modes: Air Fry, Roast, ReCrisp and Keep Warm. There’s no temperature button. You pick a mode, set the time and the PowerPod looks after the heat. You can see the food through the glass without opening anything, both containers come with lids for storage, and the PowerPod nests on top when you put it away.
SharkNinja lists it at 29.3cm high, 29.7cm wide and 24.8cm deep, which makes it the shallowest model here and gives it the smallest footprint overall. It is the widest of the three, though, and the 15cm of clearance Ninja asks for on every side is worth keeping in mind.
| Model | FN101UK (e.g. FN101UKGY, depending on colour) |
| Capacity | 1.4L + 3.8L glass containers |
| Rated power | 1,700W |
| Cooking functions | Air Fry, Roast, ReCrisp, Keep Warm |
| Temperature control | No manual setting; heat is set by the mode |
| Dimensions | 29.3cm H × 29.7cm W × 24.8cm D |
| Weight | 5.08kg |
| Containers | TempWare glass, described by Ninja as thermal-shock resistant |
| Cleaning | Glass containers, crisper plates, adaptor and lids are dishwasher-safe (lids on the top rack); the PowerPod must not go in the dishwasher |
| Guarantee | 1 year as standard, 2 years if registered within 28 days |
Why I picked it
Small households often end up choosing between a tiny air fryer that feels cramped and a bigger one that’s too much for a single portion. The CRISPi gets round that with its two containers. The glass is useful too: you can watch the food, serve straight from the container and keep leftovers in it with the lid on. If you’re happy to pay more and give up a temperature dial, it’s our premium pick.
Pros and cons
- Two container sizes suit single portions and fuller meals.
- Shallowest body and smallest footprint of the three.
- Glass lets you check food without opening anything.
- Containers double as serving and storage dishes, with lids included.
- Two-year guarantee once registered.
- No temperature setting, which limits recipes that need a specific heat.
- Widest of the three, and Ninja asks for 15cm of clearance on all sides and above.
- Costs more than a basic 3.8L drawer air fryer at full price.
- The glass needs care with sudden temperature changes.
Buy it if: you cook for one or two, like to prep and store meals, and want the flexibility of two container sizes.
Skip it if: you want to set exact temperatures, you bake a lot (see our best air fryers for baking) or you’re after the lowest price, in which case our best air fryers under £100 guide is a better fit.
2. Instant Vortex 4-in-1 3.8L: Best Small Air Fryer for Everyday Use
Score: 9.1/10
If the CRISPi is more than you need, the Instant Vortex 4-in-1 is a simpler alternative. It’s a conventional single-drawer air fryer with a 3.8L basket and four programmes: Air Fry, Roast, Bake and Reheat. You set the time and temperature with a dial, so there’s very little to learn.
Instant lists the current UK model (SKU 140-3092-01-UK) at 25.7cm × 33.1cm and 28cm high, so it’s the lowest of the three. With the narrow side at the front, it takes up roughly 26cm of worktop width, which is handy if you’re fitting it into a gap between other appliances.
Air Fry, Roast and Bake run from 82°C to 205°C, and Reheat goes as low as 49°C. Instant rates it at 1,400–1,650W, while the UK product page quotes 1,400W, so you may see different power figures from different retailers.
| Model | Vortex 4-in-1 3.8L (SKU 140-3092-01-UK) |
| Capacity | 3.8L |
| Rated power | 1,400–1,650W |
| Cooking functions | Air Fry, Roast, Bake, Reheat |
| Temperature range | 82–205°C (Reheat 49–182°C) |
| Timer | 1–60 minutes |
| Dimensions | 28cm H × approx. 25.7cm W × 33.1cm D |
| Weight | 3.92kg |
| Power cord | 70cm |
| Power supply | 220–240V, 50–60Hz |
| Guarantee | 1 year |
Why I picked it
The Vortex is the easiest of the three to just pick up and use. The 3.8L basket handles everyday meals for one or two, the narrow front helps on a crowded worktop, and the dial will feel familiar to anyone who has used an oven. It doesn’t have the CRISPi’s two containers or the COSORI’s app, and plenty of people won’t miss either.
Pros and cons
- Narrowest and lowest body of the three.
- Simple dial for time and temperature on every programme.
- Bake and Reheat programmes as well as Air Fry and Roast.
- Lightest here at 3.92kg.
- No viewing window.
- No app or smart features.
- Only a one-year guarantee.
- Short 70cm power cord.
- Single basket, so no smaller option for one portion.
Buy it if: you want a conventional air fryer for one or two people with simple controls and a narrow footprint.
Skip it if: you want a viewing window, app control or a longer guarantee, or you regularly cook family-size portions.
3. COSORI Lite Smart 3.8L: Best Smart Small Air Fryer
Score: 8.9/10
The COSORI Lite Smart 3.8L (model CAF-LI401S) is for buyers who want a compact air fryer they can control from their phone. It pairs a 3.8L basket with 1,500W rated power and a 75–230°C range, and it connects to the VeSync app over Wi-Fi and Bluetooth.
The body is 27cm wide, 27cm deep and 32.5cm high, so it’s the tallest here but still fairly compact. The depth grows to 37.5cm once you include the handle and rear air-outlet spacer, and COSORI asks for 13cm behind and above on top of that. Check your worktop depth, not just the width.
One thing to know about the smart side: COSORI’s manual says you can control everything from the app except starting a cook, which you still do on the air fryer for safety reasons. Once it’s running, you can monitor progress and change settings, use COSORI’s app recipes or save your own, and link it to Google Assistant. Networked standby is rated at under 2W, so leaving it connected all year costs no more than about £4.60 at the current price cap rate.
| Model | CAF-LI401S |
| Capacity | 3.8L |
| Rated power | 1,500W |
| Temperature range | 75–230°C |
| Timer | 1–60 minutes |
| Presets | Chicken, Fries, Bacon, Steak, Veggies, Keep Warm, Preheat |
| Body dimensions | 32.5cm H × 27cm W × 27cm D |
| Depth incl. handle and spacer | 37.5cm |
| Weight | 4.52kg |
| Connectivity | Wi-Fi and Bluetooth; VeSync app; Google Assistant |
| Cleaning | Basket and crisper plate are dishwasher-safe |
| Warranty | 2 years |
Why I picked it
A digital display doesn’t make an air fryer smart. The Lite Smart has proper app connectivity in a compact single-basket body, and it goes hotter than the other two. The Fries, Steak and Veggies presets also beep halfway through as a reminder to shake the basket, and because there are touch controls on the machine, the app stays optional.
Pros and cons
- Genuine app control and monitoring through VeSync.
- Highest maximum temperature here at 230°C.
- Seven presets, with shake reminders on some.
- Basket and crisper plate are dishwasher-safe.
- Two-year warranty.
- You can’t start cooking from the app.
- Deepest (37.5cm with the handle and spacer) and tallest (32.5cm) of the three.
- Smart features add little if you won’t use the app.
- 3.8L may feel tight for bigger households.
Buy it if: you want app control, recipes on your phone and a higher maximum temperature in a compact air fryer.
Skip it if: you won’t use the app, or your worktop is shallow.
Running costs: how much do these small air fryers cost to use?
Running costs depend on your tariff, the programme, the temperature, how much food is in the basket and how often the heating element cycles. Rated wattage is the most the appliance can draw, not what it uses throughout every cook.
The estimates below use Ofgem’s average electricity rate of 26.32p/kWh for Direct Debit customers on a standard variable tariff in England, Scotland and Wales, from 1 October to 31 December 2026. The government has removed VAT from electricity bills for this period, so there’s no VAT to add. Standing charges are excluded.
Cost = rated power (kW) × time (hours) × unit rate
| Model | Rated power used | 15 minutes | 30 minutes | 1 hour |
|---|---|---|---|---|
| Ninja CRISPi FN101UK | 1.7kW | ≈11.2p | ≈22.4p | ≈44.7p |
| Instant Vortex 4-in-1 3.8L | 1.65kW (top of rated range) | ≈10.9p | ≈21.7p | ≈43.4p |
| COSORI Lite Smart 3.8L | 1.5kW | ≈9.9p | ≈19.7p | ≈39.5p |
These are worst-case figures that assume full power for the whole cook. In practice the heating element switches on and off to hold temperature, so real costs should be lower. The difference between the three is a penny or two per half hour; cooking time and how sensibly you load the basket matter more. For a broader look at the numbers, see our air fryer vs oven comparison.
Which small air fryer should you buy?
| If you want… | Pick | Why |
|---|---|---|
| The narrowest worktop width | Instant Vortex 4-in-1 | About 25.7cm across |
| The smallest footprint | Ninja CRISPi | 29.7 × 24.8cm, but it needs 15cm clearance all round |
| To avoid a deep air fryer | Ninja CRISPi or Instant | The COSORI needs 37.5cm plus 13cm behind |
| Very small portions | Ninja CRISPi | Its 1.4L container suits a single serving |
| The simplest everyday use | Instant Vortex 4-in-1 | Dial time and temperature, four programmes |
| The most capacity flexibility | Ninja CRISPi | Swap between 1.4L and 3.8L |
| Genuine smart features | COSORI Lite Smart | VeSync app and Google Assistant (no remote start) |
| The highest temperature | COSORI Lite Smart | Up to 230°C |
| Exact temperature settings | Instant or COSORI | The CRISPi has modes only |
| The longest guarantee | Ninja (registered) or COSORI | Two years each; Instant gives one |
A quick note on guarantees
Ninja gives one year as standard and a second year if you register within 28 days of purchase. Buying direct from SharkNinja registers it automatically, but from any other retailer you need to do it yourself. COSORI’s manual gives two years from the date of purchase, so keep your receipt or order confirmation. Instant gives one year.
A short guarantee doesn’t end your rights. If an air fryer develops a fault, UK consumer law gives you rights against the retailer for up to six years (five in Scotland), although claims are usually easier within the first six months.
Final verdict
The best small air fryer isn’t necessarily the one with the smallest basket. Saving a few centimetres doesn’t help much if you end up cooking in batches every night.
The Ninja CRISPi FN101UK takes our top spot because its 1.4L and 3.8L containers give the most adaptable setup for a smaller household, and it has the smallest body of the three. Just make sure you’re happy choosing modes rather than temperatures. The Instant Vortex 4-in-1 3.8L is the more straightforward option for everyday cooking, and the COSORI Lite Smart 3.8L completes the list for anyone who’ll make real use of the app.
FAQs
What size air fryer is best for one person?
Around 2–4L is a sensible range. A very small basket suits snacks and single portions, while 3.8L gives you room for a complete meal or a portion of leftovers. If space is really tight and you mostly cook sides, a 2L model can work. The Ninja CRISPi is unusual because it includes both a 1.4L and a 3.8L container.
Is a 3.8L air fryer small?
A 3.8L air fryer sits at the compact end of the mainstream single-basket market. It’s larger than 1.5–2L mini models but can still suit a small kitchen when the body is well proportioned. Always compare the external dimensions and clearance, not just the capacity.
Is a small air fryer big enough for two people?
Often, yes. A 3.8L basket can handle many two-person meals, although larger foods may need cooking in batches. If you regularly cook family-sized portions or several components at once, a larger basket or a dual air fryer will be more convenient.
Which is better for a small kitchen: Ninja CRISPi or Instant Vortex 3.8L?
It depends which measurement is tight. The CRISPi has the smaller footprint and is shallower, but it’s wider and Ninja asks for 15cm of clearance on all sides. The Instant is narrower and lower but deeper. Choose the Instant for a narrow gap and simple controls, and the CRISPi for flexible portion sizes and glass containers you can store food in.
Does the Ninja CRISPi have adjustable temperature control?
No, not in the usual sense. The FN101UK has no temperature button or dial. You choose Air Fry, Roast, ReCrisp or Keep Warm and set the cooking time, and the PowerPod controls the heat for that mode. You can change the mode and time during cooking, but if a recipe needs a specific temperature, you’ll have to pick the closest mode and keep an eye on the food.
Can the Ninja CRISPi glass containers go in the oven or microwave?
Ninja says the glass containers are microwave- and freezer-safe, but not safe for the oven, hob or grill. Don’t microwave them with the crisper plate inside or the lid sealed on, and don’t use parchment paper in them. Avoid sudden temperature changes too, such as adding fridge-cold food to a hot container or putting hot glass straight into the fridge.
What makes the COSORI Lite Smart ‘smart’?
It connects to the VeSync app over Wi-Fi and Bluetooth. From the app you can monitor cooking, change settings, use COSORI’s recipes and save your own, and you can link it to Google Assistant. For safety, you can’t start a cook remotely; that has to be done on the air fryer.
Are small air fryers cheaper to run than ovens?
They can be for smaller meals because there’s less space to heat, but savings vary by recipe. The actual cost depends on wattage, cooking time, thermostat cycling, your tariff and how efficiently you’d otherwise use your oven.
How much does a 1,500W air fryer cost to run?
At 26.32p/kWh, a 1,500W air fryer would cost about 39.5p for an hour at continuous full power, or around 19.7p for 30 minutes. Actual use is usually lower because the heating element cycles during cooking.
What should I measure before buying a compact air fryer?
Measure the width, depth and the height to any wall cupboards, then add the clearance from the manual: 15cm all round and above for the CRISPi, and 13cm behind and above for the COSORI. For drawer models, leave room in front to pull the basket out, and check the plug will reach a socket.
Editorial methodology and source notes
This guide is based on desk research, not hands-on testing. Specifications were checked in October 2026 against SharkNinja UK’s FN101UK product page and owner’s guide, Instant Pot UK’s Vortex 4-in-1 3.8L product page and user manual, and COSORI UK’s Lite 3.8L product page and CAF-LI401S user manual. Where a retailer listing disagreed with the manufacturer, we went with the manufacturer. The Ninja’s cord length comes from a UK retailer listing because Ninja doesn’t publish it. Running-cost examples use Ofgem’s average electricity unit rate for 1 October to 31 December 2026. Prices aren’t included because they change often.
