String trimmers with automatic line feed make routine yard cleanup easier by advancing cutting line as needed, reducing interruptions while you work around borders, beds, fences, and hard-to-reach grass.
We compared 10 electric and cordless models across cutting width, power source, edging features, ergonomics, included accessories, and overall convenience to help you choose the right tool for your lawn.
Best 10 String Trimmers with Automatic Line Feed Picks for 2026
Best Premium Cordless
- LINE IQ feeds line automatically
- 16-inch path with up to 60 minutes of runtime
- Includes 4.0Ah battery and fast charger
Best For: Larger yards and feature-focused cordless users
Best Push-Button Feed
- Push-button line advancement
- Converts to a wheeled edger
- 5.3-pound design with 6.5-amp motor
Best For: Simple corded trimming and edging around smaller yards
Best Cordless Value Kit
- Includes two 2.0Ah batteries
- Converts between trimming and edging
- Six replacement spools included
Best For: Compact cordless yard work and tight-space edging
Versatile PowerShare Pick
- Push-button instant line feed
- Converts to an edger with support wheels
- Includes two 20V batteries and charger
Best For: Lightweight residential trimming and edging
Hands-Off Line Control
FOKIKIP Automatic-Feed Trimmer
- Automatic line feeding reduces stops
- Two speeds handle routine or dense growth
- Two batteries and replacement spools included
Best For: Convenient small- to medium-yard maintenance
Extended Runtime Choice
Glenvera 20V Auto-Feed Trimmer
- Two 4.0Ah batteries are included
- Automatic feed reduces manual adjustments
- Adjustable head and rotating handle improve reach
Best For: Longer residential trimming sessions
Power-Adjustable Pick
BLACK+DECKER 40V MAX 13 in. String Trimmer
- Automatic line feed requires no bumping
- PowerCommand Dial balances power and runtime
- Includes 40V battery and fast charger
Best For: Homeowners wanting adjustable power and edging versatility
Long-Runtime Value
HEYWORK 20V 12 in. Cordless String Trimmer
- Auto line feed works without bumping
- Includes two 4.0Ah batteries
- Comes with eight replacement spools
Best For: Longer trimming sessions and lightweight yard work
Lightweight Everyday Choice
BLACK+DECKER 20V MAX 12 in. String Trimmer
- Automatic spool feed needs no bumping
- Weighs 5.7 pounds
- Converts to an edger in seconds
Best For: Routine trimming and edging where low weight matters
Best Corded 2-in-1 – BLACK+DECKER Auto Feed Trimmer
If you want a dependable option among string trimmers with automatic line feed, the BLACK+DECKER BESTA510 combines automatic spool feeding with a 14-inch cutting path. Its 6.5-amp motor, adjustable handle, and wheeled edge guide make it suited to routine trimming and edging around a typical yard.
Best For: Homeowners who want a lightweight corded trimmer that also handles sidewalk, border, and flower-bed edging.
Pros:
- Automatic feed spool technology eliminates bumping for line feeding.
- Rotates between trimmer and wheeled edger modes.
- 6.5-amp motor, POWERDRIVE Transmission, and a 14-inch cutting path.
- Adjustable handle and height positions support more comfortable use.
Cons:
- Corded operation requires access to an outdoor power connection.
- The 14-inch cutting width may be less efficient for very large areas than wider models.
This is a practical choice when consistent automatic line feeding and easy edging matter more than cordless convenience. The included spool, guard, and auxiliary handle add useful setup value, while the two-year limited warranty provides additional coverage.
Best Premium Cordless – EGO POWER+ LINE IQ Trimmer
The EGO POWER+ ST1623T is a high-end choice among string trimmers with automatic line feed, using LINE IQ technology to sense and feed line while maintaining a 16-inch cutting swath. It also includes a 4.0Ah battery and charger, making it ready for cordless yard work without a separate battery purchase.
Best For: Larger trimming jobs and users who want cordless convenience, automatic line management, and adjustable performance.
Pros:
- LINE IQ automatically monitors and feeds line without bumping.
- 16-inch cutting width and up to 60 minutes of runtime with the included battery.
- POWERLOAD system automatically winds line after it is fed through the head.
- Telescopic carbon-fiber shaft and digital variable-speed selector improve adjustability.
Cons:
- Its cordless system requires charging before extended work.
- The included charger takes about 55 minutes to charge the 4.0Ah battery.
- Its premium feature set may be more than needed for small trimming tasks.
With a brushless motor, low vibration, a broad cutting path, and compatibility with other EGO 56V ARC Lithium batteries, this model is built for demanding regular use. The five-year tool warranty and three-year battery warranty further strengthen its long-term appeal.
Best Push-Button Feed – BLACK+DECKER EASYFEED Trimmer
For shoppers comparing string trimmers with automatic line feed, the BLACK+DECKER BESTE620 offers EASYFEED line advancement at the push of a button. Its 6.5-amp motor, lightweight 5.3-pound design, and rotating wheeled guide support both trimming and edging tasks.
Best For: Budget-minded homeowners who prefer simple push-button line control and a compact corded tool.
Pros:
- EASYFEED advances line without bumping.
- 2-in-1 design converts from a trimmer to a wheeled edger.
- Lightweight construction with adjustable handle and height positions.
- 6.5-amp motor and POWERDRIVE Transmission are designed for tough weeds and overgrowth.
Cons:
- It is corded, so the working area depends on access to power and cord reach.
- The supplied notes do not list a battery option or runtime.
The BESTE620 is a straightforward choice if you want controlled line advancement without the bumping process. Its edge guide and light weight make it especially useful for routine lawn borders, while the two-year limited warranty adds basic ownership support.
Best Cordless Value Kit – VARSK Auto Feed Trimmer
The VARSK 12-inch model is a flexible pick among string trimmers with automatic line feed, combining cordless operation with a trimmer-to-edger conversion and two included 2.0Ah batteries. Its adjustable handle, pivoting head, stabilizer wheel, and extra spools are useful for varied lawn and garden tasks.
Best For: Users who want a compact cordless kit with two batteries, edging capability, and replacement spools included.
Pros:
- Automatic line feed and 2-in-1 trimming and edging design.
- Two 2.0Ah batteries provide more than 30 minutes of stated cordless runtime.
- 180-degree adjustable handle and 80-degree pivoting cutting head support multi-angle work.
- Includes six replacement spools and a charger.
Cons:
- The 12-inch cutting width is narrower than the 14- and 16-inch alternatives here.
- The stated runtime is over 30 minutes, which may require battery changes for longer jobs.
- Warranty coverage is limited to one year.
This VARSK kit emphasizes convenience and maneuverability rather than maximum cutting width. The two-battery setup, stabilizer wheel, and included spool supply make it a practical fit for smaller yards, garden beds, and trimming in tight spaces.
Versatile PowerShare Pick – 2-in-1 WORX Trimmer & Edger
If you want string trimmers with automatic line feed, the WORX WG163 offers a convenient push-button Command Feed system for immediate line adjustment. Its 12-inch cutting width, cordless design, and included batteries make it a practical choice for routine trimming and edging.
Best For: Homeowners who want one lightweight tool for lawn trimming and edging, including sloped or hard-to-reach areas.
Pros:
- Push-button instant line feed with free spools for life.
- Converts from trimmer to edger in seconds and includes support wheels.
- Adjustable 90-degree head, spacer guard, two 20V batteries, and charger included.
Cons:
- The 0.065-inch line and 12-inch cutting width are geared toward routine residential work.
- Its 5.5-pound weight is listed for the machine and may not reflect the batteries.
The WG163 stands out for straightforward controls and edging support. It is especially appealing if you already use, or plan to use, other tools in the WORX Power Share family.
Hands-Off Line Control – FOKIKIP Automatic-Feed Trimmer
Among string trimmers with automatic line feed, the FOKIKIP 12-inch model is designed to reduce interruptions by replenishing and trimming excess line automatically. Two speed settings, two batteries, and an adjustable design give it flexibility for everyday yard work.
Best For: Small to medium-sized yards where convenient line management, alternating batteries, and adaptable handling are priorities.
Pros:
- Automatic line feed maintains the line length during use.
- Two speed modes support routine trimming and denser weeds.
- Includes two 2.0Ah batteries, a fast charger, and replacement spools.
- Rotating head, adjustable handle, and trimming wheel help with borders and tight areas.
Cons:
- The supplied details do not specify motor speed or a runtime independently of usage conditions.
- Battery type is listed as nonstandard, which may limit interchangeability.
This model focuses on convenience: automatic feeding, dual-battery operation, and quick switching between trimming and edging. The included spare spools also reduce the need for an immediate additional purchase.
Extended Runtime Choice – Glenvera 20V Auto-Feed Trimmer
For shoppers comparing string trimmers with automatic line feed, the Glenvera combines automatic line adjustment with a 12-inch cutting swath and a motor rated up to 9,000 RPM. Its two 4.0Ah batteries are intended to support longer sessions before recharging.
Best For: Larger residential lawn-care tasks where extended battery capacity and flexible trimming positions matter.
Pros:
- Automatic line feed helps keep the cutting line at its working length.
- Two 20V 4.0Ah batteries and charger are included, with up to 60 minutes of stated runtime.
- Offers trimming and edging modes, a four-position adjustable head, and a 180-degree rotating handle.
- 9,000 RPM motor rating and 12-inch cutting width support efficient coverage.
Cons:
- The product uses listed nonstandard batteries, so replacement compatibility should be checked.
- The larger 4.0Ah batteries may add carrying weight compared with smaller packs.
The Glenvera is the strongest fit here for users who value battery capacity and reach. Its automatic feed and adjustable head can make longer trimming sessions more manageable, while the included spare spools add convenience.
Power-Adjustable Pick – BLACK+DECKER 40V MAX 13 in. String Trimmer
For shoppers comparing string trimmers with automatic line feed, this BLACK+DECKER model combines automatic spool advancement with adjustable power and a 40V battery. Its 13-inch cutting width, high-speed operation, and quick trimmer-to-edger conversion make it a flexible choice for routine lawn maintenance.
Best For: Homeowners who want adjustable power, a 40V battery, and trimming and edging in one tool.
Pros:
- Automatic Feed Spool supplies line without bumping.
- PowerCommand Dial lets you prioritize power or runtime.
- Includes battery, fast charger, guard, auxiliary handle, and spool.
- Converts to an edger in seconds and has an adjustable telescoping pole.
Cons:
- The 13-inch cutting width is narrower than some larger trimmers.
- It is heavier than the listed 20V BLACK+DECKER model at 7.8 pounds.
This is a well-equipped option when automatic line feeding and runtime control matter more than having the lightest possible tool. The included fast charger and edging function add practical versatility.
Long-Runtime Value – HEYWORK 20V 12 in. Cordless String Trimmer
This HEYWORK is a practical contender among string trimmers with automatic line feed, using an auto-feed system to release line as it wears short. It also includes two 4.0Ah batteries and eight replacement spools, making the package suited to longer trimming sessions and ongoing yard care.
Best For: Users seeking a lightweight cordless trimmer with two batteries and plenty of included replacement line.
Pros:
- Automatic line feed keeps work moving without tapping the spool.
- Two 20V 4.0Ah batteries support longer use.
- Lightweight 6.3-pound design with an adjustable grip.
- Switches between trimming and edging modes and includes eight pre-wound spools.
Cons:
- The 12-inch cutting width is suited to general maintenance rather than wider swaths.
- The supplied details describe the batteries as AAA in one specification field, despite the product bullets identifying them as 20V 4.0Ah lithium-ion batteries.
Its strongest advantage is the package: dual batteries and eight spools reduce interruptions and replacement purchases. The lightweight build also favors users who prioritize maneuverability during extended outdoor work.
Lightweight Everyday Choice – BLACK+DECKER 20V MAX 12 in. String Trimmer
For smaller lawn-care tasks, this BLACK+DECKER offers automatic line feeding, a 12-inch cutting swath, and quick conversion between trimming and edging. Its 5.7-pound design, adjustable handle and height positions, and included 20V battery make it a straightforward cordless option.
Best For: Homeowners who want a lighter trimmer for routine trimming and defined lawn edging.
Pros:
- Automatic Feed Spool advances line without bumping.
- Lightweight design with adjustable handle and height positions.
- Converts from trimmer to edger in seconds.
- Includes a 20V battery, charger, wall-mountable charging base, and spool.
Cons:
- Its 6200 RPM motor is less powerful on paper than the listed 40V BLACK+DECKER model.
- Includes one 2.0Ah battery rather than two batteries.
This model is a sensible fit for users who value low weight and simple operation. It covers basic trimming and edging without gas-related mess, while the automatic feed removes the need for manual bumping.
How We Picked the Best String Trimmers with Automatic Line Feed
We focused on models designed for homeowners who want simpler line management and dependable trimming around lawn edges and landscaping. Our comparison considered automatic-feed or auto-spool systems, cutting width, motor or battery platform, runtime potential, weight, shaft adjustability, conversion to an edger, and what comes in the box.
Because product specifications can vary by package, verify the included battery, charger, spool, and replacement-line details before ordering. Corded models can provide consistent power, while cordless options offer easier movement and are often more convenient for medium-size yards.
Quick Comparison
| Feature | What to look for | Best fit |
|---|---|---|
| Power source | Corded electric or rechargeable battery | Corded for uninterrupted sessions; cordless for mobility |
| Cutting width | About 12 to 16 inches | Narrow widths for precision; wider widths for open areas |
| Edging function | Rotating head or 2-in-1 conversion | Lawns with sidewalks, driveways, and defined borders |
| Included accessories | Battery, charger, spools, or extra line | Buyers seeking a ready-to-use package |
Key Buying Factors for String Trimmers with Automatic Line Feed
Feed Mechanism and Line Compatibility
Automatic feed is convenient, but check how it operates. Some designs advance line during use, while others use an auto-spool system that simplifies replacement. Confirm the recommended line diameter and whether compatible replacement spools are easy to find.
Power and Runtime
For small yards or light trimming, a compact 20V-class cordless model may be sufficient. Larger properties and dense growth benefit from higher-voltage systems or a corded motor. Battery capacity matters as much as voltage, and a second battery can reduce downtime.
Cutting Width, Weight, and Control
A wider head covers more ground per pass but can be less precise in tight beds. Look for a manageable weight, adjustable shaft, comfortable handle, and a guard that limits debris. These details matter during longer trimming sessions.
Edging and Maintenance
A 2-in-1 trimmer-edger is useful if you maintain crisp borders. Consider how easily the head rotates and whether the tool remains balanced in edging mode. Always clear wrapped grass, inspect the guard, and use eye protection during operation.
Who Should Buy Which String Trimmers with Automatic Line Feed?
Choose a corded BLACK+DECKER model if you want consistent power for a smaller yard and do not mind managing an extension cord. A compact 20V cordless trimmer is a practical choice for routine touch-ups, garden beds, and limited storage space. Select the EGO POWER+ model if you need a wider cutting path and stronger cordless performance for more demanding areas.
Models supplied with a battery and charger are convenient for first-time buyers, while bare-tool options make more sense if you already own compatible batteries. For the most precise purchase, match the trimmer’s voltage, cutting width, feed system, and included accessories to your yard size and maintenance habits.