# encoder

/ɛnˈkoʊdɚ/ (US) · /ɛnkˈəʊdɐ/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/encoder
Updated: 2026-10-13

## Definition

a piece of software or hardware that changes information into a different format. You use it to make files smaller or to keep data safe.

For teachers: a device, circuit, or software program that converts information from one format or code into another, often for the purposes of compression or encryption.

## Examples

- You need a video encoder to stream your gameplay online.
- The software includes a high-quality audio encoder that reduces file size without losing much sound detail.
- Modern digital broadcasting relies on a sophisticated hardware encoder to process raw video signals into a compressed stream suitable for satellite transmission.

## Synonyms

converter, compressor

## Antonyms

decoder

## Usage notes

- Commonly used in the context of digital media, telecommunications, and data security.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.