What Is a Letter Opener? | Tool, Types, and Uses

A letter opener is a tool designed to slice open sealed envelopes cleanly along one edge without tearing the contents inside.

A letter opener exists to solve one small daily problem: getting into an envelope fast without shredding the letter inside. Whether you are sorting mail at a desk or processing hundreds of envelopes in a mailroom, the tool does the same job — making a precise cut along one edge. Understanding what a letter opener is, the forms it takes, and how to use one safely helps you pick the right tool for your mail volume.

Main Types of Letter Openers

Letter openers fall into two broad categories that match how much mail you handle. The right choice depends almost entirely on volume.

• Manual hand tools: The classic style, often made of wood, metal, or plastic, with a blade and a handle. You slide the blade into the gap at the top of the envelope and lift gently to separate the edge. Consumer versions range from simple plastic models to decorative rosewood and stainless steel designs, with prices typically from $3 to $27.
• Electric desktop openers: Small battery-powered or plug-in devices that pull the envelope through a cutting slot. Examples include the Martin Yale Model 1624 handheld battery-operated unit and the United Office Products EO2 Desktop Electric model. These suit home offices that get a steady stream of mail.
• Automatic mailroom machines: High-volume units that feed envelopes through and cut one edge at speed. Pitney Bowes notes these models can handle “a few hundred to tens of thousands of envelopes per hour” depending on the machine, making them standard equipment in corporate mailrooms.

How a Letter Opener Works

All letter openers share the same basic principle: a blade cuts or slices the folded edge of the envelope rather than ripping it open by hand. The manual method is simple — you insert the opener into the top gap of the sealed envelope and lift gently so the top edge separates cleanly. The blade needs to be sharp enough to make a smooth cut, but not so aggressive that it slices into the contents, which is why many manual openers use a shallow blade angle.

Electric and machine versions automate that cut. You feed the envelope into a slot or tray; rollers grip it, carry it past a cutting wheel, and eject it with one side opened. The operator then removes and sorts the contents. That sorting step matters — a machine opener only opens the envelope, it does not extract the letter.

Choosing the Right Letter Opener

Your mail volume should dictate which type you buy. For most home users and small offices, a manual opener is the practical pick — it is inexpensive, needs no power, and takes seconds to use. The Westcott 29691 All-Purpose Rosewood Handle Letter Opener (9 inches) is a common, well-priced example in the $7-$10 range. For a home office processing a few dozen envelopes a week, an electric model like the Asmix LO85W or LO80B adds convenience at a higher price, typically between $20 and $150 depending on features.

Mailroom machines, including the 1616 Desktop Letter Opener or Pitney Bowes units, only make sense when you handle large volumes daily. Those range widely in price — some models appear around $105, while high-capacity commercial units reach $1,595 or more. If you are buying for a business, factor in the throughput you actually need rather than paying for top-end speed you will never use.

For collectors and those who appreciate the classic form, antique and vintage letter openers are a distinct niche. These often feature ornate handles, ivory or bone inlays, and decorative metalwork from past eras. If that appeals to you, our roundup of the best antique letter openers worth collecting covers the most desirable styles and what to look for.

Letter Opener Safety and Care

The cutting edge on any letter opener is genuinely sharp — treat it like the blade it is. Keep openers away from children, store them in a drawer or on a desk stand where the blade is not exposed, and never leave one loose in a pile of papers where a hand could land on it. When using a manual opener, cut away from your body and keep your other hand clear of the blade path. Electric models add a second risk: the feed mechanism can catch a finger, so always let the rollers pull the envelope rather than pushing it in yourself.