Any Framework
CLI tool for counting, encoding, decoding, and exploring BPE tokens. Powered by the fastest .NET tokenizer.
Published
Mar 24, 2026
6mo ago
Total Downloads
4.6K
4,649
Install
dotnet add package Tiktoken.Cli.win-arm64 --version 3.1.1
No framework information available.
README
ttok — Token Counter CLI
The fastest .NET CLI tool for counting, encoding, decoding, and exploring BPE tokens. Powered by Tiktoken (618 MiB/s).
Install
# Homebrew (macOS — always installs latest release)
brew install tryAGI/tap/ttok
# Shell script (macOS/Linux — auto-detects OS/arch)
curl -fsSL https://raw.githubusercontent.com/tryAGI/Tiktoken/main/install.sh | sh
# Recommended for Linux — Homebrew cask is macOS-only
# PowerShell (Windows — auto-detects arch)
irm https://raw.githubusercontent.com/tryAGI/Tiktoken/main/install.ps1 | iex
# .NET global tool (NativeAOT on .NET 10+)
dotnet tool install -g Tiktoken.Cli
# Or run without installing (.NET 10+)
dnx Tiktoken.Cli "Hello world"
Standalone binary (no .NET required)
Download a pre-built native binary from GitHub Releases:
| Platform | Download |
|---|---|
| Linux x64 | ttok-linux-x64.tar.gz |
| Linux x64 (Alpine/musl) | ttok-linux-musl-x64.tar.gz |
| Linux ARM64 | ttok-linux-arm64.tar.gz |
| Linux ARM64 (Alpine/musl) | ttok-linux-musl-arm64.tar.gz |
| macOS Apple Silicon | ttok-osx-arm64.tar.gz |
| macOS Intel | ttok-osx-x64.tar.gz |
| Windows x64 | ttok-win-x64.zip |
| Windows ARM64 | ttok-win-arm64.zip |
Docker
# Use the Alpine/musl binary in a container
docker run --rm -v "$(pwd):/src" -w /src alpine sh -c '
wget -qO- https://github.com/tryAGI/Tiktoken/releases/latest/download/ttok-linux-musl-x64.tar.gz | tar xz
echo "Hello world" | ./ttok
'
Usage
Count tokens (default: gpt-4o / o200k_base)
echo "Hello world" | ttok
# 3
cat prompt.md | ttok --model gpt-4
# 1847
Encode / Decode / Explore
# Show token IDs
echo "Hello world" | ttok --encode
# 13225 2375
# Decode token IDs back to text
echo "13225 2375" | ttok --decode
# Hello world
# Show token boundaries
echo "Hello world" | ttok --explore
# |Hello| world|
# Truncate to N tokens
cat long_doc.md | ttok --truncate 4000
Count files
ttok prompt.md system.md
# prompt.md 1,847
# system.md 423
# ─────────────────────
# 2 files 2,270 tokens
Scan directories (respects .gitignore)
ttok src/ --include "*.cs"
# JSON output for CI
ttok . --format json
# Sort by token count
ttok . --sort tokens --top 10
# Group by extension
ttok . --group-by ext
# Compare against model context window
ttok . --context-check
# Fail if over limit (CI gate, exit code 2)
ttok . --max-tokens 50000
Options
| Option | Description |
|---|---|
-m, --model |
Model name (default: gpt-4o) |
-e, --encoding |
Encoding name (cl100k_base, o200k_base, etc.) |
--encode |
Output token IDs |
--decode |
Decode token IDs to text |
--explore |
Show token boundaries |
-t, --truncate N |
Truncate to N tokens |
--include |
Include file patterns (e.g. *.cs) |
--exclude |
Exclude file patterns |
--max-file-size |
Skip files over size (default: 50mb) |
-f, --format |
Output format: table or json |
--sort |
Sort: tokens or name |
--top N |
Show only top N files |
--group-by ext |
Group by file extension |
--context-check |
Show % of model context window |
--max-tokens N |
Exit code 2 if exceeded |
-q, --quiet |
Suppress summary footer |
--no-default-excludes |
Include bin/, obj/, node_modules/, etc. |
--no-gitignore |
Disable .gitignore processing |
--progress |
Show progress to stderr |
--stats |
Show scan statistics to stderr |
--version |
Show version information |
Supported models
All OpenAI models are supported via prefix matching: gpt-4o, gpt-4.1, gpt-4, gpt-3.5-turbo, o1, o3, o4-mini, and more.
Direct encoding names: o200k_base, cl100k_base, p50k_base, p50k_edit, r50k_base.
Changes from Previous Version
No structural changes between v3.1.1-alpha.0.1 and v3.1.1.
Adoption Assessment
Assess this package against its supported frameworks, license, maintenance signals and dependency graph before making it a project standard.
No SPDX license expression is published. Review the license text and your organisation's policy before redistribution.No target framework metadata is available. Confirm compatibility in a representative project before standardising on this package.
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