3 unstable releases

Uses new Rust 2024

0.2.0	Apr 3, 2026
0.1.3	Mar 29, 2026
0.1.0	Mar 26, 2026

#2288 in Text processing

MIT license

1.5MB
6K SLoC

prezzy

Make any CLI output beautiful. Zero config. Just pipe.

prezzy demo

command | prezzy

Prezzy auto-detects the format of piped CLI output and applies syntax highlighting, structural formatting, and color. JSON gets indented. Logs get level-colored. CSV becomes a table. Diffs get green/red. All automatically.

Install

Homebrew (macOS/Linux)

brew install viziums/tap/prezzy

Cargo (Rust)

cargo install prezzy

npm (via binary wrapper)

npm install -g prezzy-cli

Pre-built binaries

Download from GitHub Releases for Linux, macOS (Intel + Apple Silicon), and Windows.

Shell completions

prezzy --completions=bash >> ~/.bashrc
prezzy --completions=zsh >> ~/.zshrc
prezzy --completions=fish > ~/.config/fish/completions/prezzy.fish

Usage

# JSON - auto-indented and highlighted
curl -s https://api.github.com/users/octocat | prezzy

# Structured logs (NDJSON) - columnar view with colored levels
docker compose logs --format json | prezzy

# Plain text logs - timestamp dimmed, levels colored
tail -f /var/log/app.log | prezzy

# Diffs - green additions, red deletions
git diff | prezzy

# CSV / TSV - rendered as a bordered table
cat data.csv | prezzy

# Environment variables - aligned columns
env | prezzy

# YAML config - syntax highlighted
cat config.yaml | prezzy

# XML / HTML - tag and attribute coloring
cat pom.xml | prezzy

# Stack traces - error bold red, library frames dimmed
python script.py 2>&1 | prezzy

# Markdown - headings, code blocks, lists
cat README.md | prezzy

# Filter logs by level
docker compose logs | prezzy --level=warn

# Use a different theme
cat data.json | prezzy --theme=dracula

# Pipe through a pager
kubectl logs pod-name | prezzy --pager

Supported Formats

Format	Detection	What prezzy does
JSON	`{` or `[` start	Indent, syntax highlight keys/values/types
NDJSON	JSON objects per line	Columnar: timestamp, level, message, extra fields
Log lines	Timestamp + level patterns	Dim timestamps, color levels by severity
Diff / Patch	`@@`, `---`, `+++` markers	Green adds, red removes, bold headers
Stack traces	Python, JS, Java, Rust, Go, C#, Ruby	Bold error, dim library frames, highlight your code
CSV / TSV	Consistent delimiters	Bordered table with header row
Key=Value	`KEY=value` pattern	Aligned columns
YAML	`key: value` patterns	Syntax highlight keys, values, types
XML / HTML	`<tag>` patterns	Highlight tags, attributes, values
Markdown	`#` headings, fences, lists	Bold headings, colored markers, code blocks
Plain text	Fallback	Passthrough (no corruption)

Themes

prezzy --list-themes

Built-in: default, monokai, dracula, solarized-dark, solarized-light, nord, gruvbox

Set a default theme in ~/.config/prezzy/config.toml:

theme = "dracula"

Configuration

Create ~/.config/prezzy/config.toml:

# Default color theme
theme = "default"

# Use ASCII box-drawing (for screen readers or limited terminals)
ascii = false

# Default log level filter
# level = "info"

CLI flags always override config file values.

Flags

prezzy [OPTIONS] [FILE]

Options:
  -f, --format <FORMAT>    Force a specific format
  -t, --theme <THEME>      Color theme [default: default]
      --color <MODE>       auto, always, never [default: auto]
  -w, --width <COLS>       Override terminal width
  -l, --level <LEVEL>      Filter logs by minimum level
      --ascii              Use ASCII box-drawing characters
      --pager              Pipe through less
      --list-themes        List available themes
  -h, --help               Print help
  -V, --version            Print version

Standards

Respects NO_COLOR and FORCE_COLOR
Safe in pipelines -- no escape codes when stdout is not a TTY
Handles broken pipes gracefully (prezzy | head)
Never modifies input when it can't detect the format

License

MIT

Dependencies

~31–47MB
~755K SLoC