Bug-free

adj. capable, calm professional

What it means

Operating without any known software defects.

Reach for it when describing a tested release while avoiding a guarantee about undiscovered defects

The team shipped a bug-free build under the agreed test suite.

Words to choose between 5

By register, from playful at the top to literary at the bottom. Tap a word to see when it fits.
playful
everyday
professional
  • playful

    clean

    Fits when informal engineering shorthand means no observed issues

    Careful Clean could mean code style, security, or build output instead.

  • everyday

    working as intended

    Fits when plain language ties success to expected behavior

    Careful The intended behavior itself may be incomplete or wrong.

  • professional

    defect-free

    Fits when testing found no failures against defined requirements

    Careful Defect-free is still an absolute claim and depends on test scope.

  • professional

    error-free

    Fits when output contains no detected mistakes

    Careful Error-free can refer to data or human work rather than software behavior.

  • professional

    stable

    Fits when the system runs reliably without frequent crashes or regressions

    Careful Stable software can still contain many functional bugs.

Opposites 3

  • buggy
  • defective
  • unstable

Common phrases 3

  • bug-free release

    The bug-free release passed the published regression suite.

  • bug-free code

    Bug-free code remains a claim about what testing has found so far.

  • apparently bug-free

    The feature is apparently bug-free under the supported browsers.

Usage notes

Keep in mind

Bug-free is an absolute claim that testing cannot prove for nontrivial software. Name the tested scope and say no known bugs when that is the verified fact.

Definitions and examples are written for this site. How words are chosen Updated