Prompt Token Optimization Prompt Engineering Tools

Tools for analyzing, compressing, and optimizing token usage in LLM prompts through visualization, encoding formats, and data compression techniques. Does NOT include general prompt writing guides, model selection tools, or workflow orchestration platforms.

There are 38 prompt token optimization tools tracked. 1 score above 50 (established tier). The highest-rated is connectaman/LoPace at 51/100 with 3 stars and 120 monthly downloads.

Get all 38 projects as JSON

curl "https://pt-edge.onrender.com/api/v1/datasets/quality?domain=prompt-engineering&subcategory=prompt-token-optimization&limit=20"

Open to everyone — 100 requests/day, no key needed. Get a free key for 1,000/day.

#	Tool	Score	Tier	Stars	Language
1	connectaman/LoPace LoPace is a bi-directional encoding framework designed to reduce the storage...	51	Established	3	Python
2	LakshmiN5/promptqc ESLint for your system prompts — catch contradictions, anti-patterns,...	47	Emerging	1	Python
3	roli-lpci/lintlang Static linter for AI agent tool descriptions, system prompts, and configs....	45	Emerging	4	Python
4	sbsaga/toon TOON — Laravel AI package for compact, human-readable, token-efficient data...	41	Emerging	57	PHP
5	nooscraft/tokuin CLI tool – estimates LLM tokens/costs and runs provider-aware load tests for...	38	Emerging	128	Rust
6	therohanparmar/t3-toon TOON for TYPO3 — a compact, human-readable, and token-efficient data format...	38	Emerging	4	PHP
7	study8677/PromptLint PromptLint — Lint prompts for robustness across models and temperatures.	36	Emerging	5	Python
8	thesupermegabuff/megabuff-cli 🤖 CLI for Better prompts, transparent costs, & zero vendor lock-in. Optimize...	35	Emerging	5	JavaScript
9	chatde/tokenshrink Same AI, fewer tokens. Free forever. — tokenshrink.com	34	Emerging	7	JavaScript
10	martc03/PromptCommit Git for your prompts. Version control, A/B test, and iterate on LLM prompts...	34	Emerging	3	Python
11	smixs/ZPL-80 Zip Prompt Language - compress heavy system prompts by ≥ 80 % token reduction	33	Emerging	15	—
12	pavanvamsi3/prompt-cop A light weight library prompt-cop scans text files in your project for...	30	Emerging	8	JavaScript
13	Mattbusel/Token-Visualizer The ultimate tool for analyzing, visualizing, and optimizing your LLM prompts	30	Emerging	9	Python
14	metawake/prompt_compressor Compresses LLM prompts while preserving semantic meaning to reduce token...	29	Experimental	8	Python
15	scottconverse/promptlint Static analysis for LLM prompts. 34 rules, auto-fix, CI-ready. The ESLint...	22	Experimental	—	Python
16	yuechen-li-dev/GenerativeCompressionProtocol The first model-native prompt compression protocol	22	Experimental	1	—
17	getkaizen/kaizen-sdk Open source client SDKs to Save AI cost via Kaizen AI Cost Optimization...	22	Experimental	4	MDX
18	llmhut/llm-diff See token count changes, cost deltas, latency shifts, and a word-level diff...	22	Experimental	—	JavaScript
19	KurtWeston/token-count Calculate token counts for text using various LLM tokenizers to estimate API...	22	Experimental	—	Rust
20	Camj78/Cost-Guard-AI CostGuardAI — an AI prompt preflight SaaS that predicts token usage, cost,...	22	Experimental	—	TypeScript
21	Yashwanth9394/tokenpack Pack JSON data into token-efficient formats for LLM prompts. Save 37-47% on...	22	Experimental	—	Python
22	chirindaopensource/compact_prompt_unified_pipeline_prompt_data_compression_LLM_workflows End-to-End Python implementation of CompactPrompt (Choi et al., 2025): a...	21	Experimental	2	Jupyter Notebook
23	maxh33/VTT-to-Insights Turn raw .vtt lecture files into clean, AI-ready transcripts. Removes UUID...	21	Experimental	—	Python
24	yoyo11q8/megabuff-cli 🤖 Optimize AI prompts, uncover costs, and ensure vendor freedom across...	21	Experimental	—	JavaScript
25	bgerd/promptlab Version control for AI prompts — track iterations with session history,...	21	Experimental	—	Shell
26	Reprompts/repmt repmt is a lightweight Python library that automatically parses large Python...	20	Experimental	3	Python
27	Mattbusel/tokenviz TokenViz — A CLI tool to visualize token usage in OpenAI prompts, helping...	19	Experimental	2	Python
28	korchasa/promptlint Prompt Linter	18	Experimental	2	Go
29	jedick/noteworthy-differences Noteworthy differences between revisions of Wikipedia articles: an AI...	17	Experimental	—	Python
30	RudraDudhat2509/diffprompt git diff for prompt engineers	14	Experimental	1	Python
31	JamCatAI/prompt-lint Static analyzer for LLM prompts — catch injection risks, vague instructions,...	13	Experimental	—	Python
32	g14ayushi/JSONizer JSONizer is an LLM-powered system that converts unstructured business text...	13	Experimental	—	Python
33	LakshmiSravyaVedantham/token-diet Compresses prompts to use fewer tokens without losing meaning — saves up to...	13	Experimental	—	Python
34	ashwin400/prompt-lint Static analyzer for LLM prompts. Scores 0-100, finds vague language, missing...	13	Experimental	—	Python
35	ddaverse/llm-token-counter Free online LLM Token Counter to estimate token usage and API cost for...	13	Experimental	—	—
36	ddaverse/ai-prompt-cost-tracker Free AI Prompt Cost Calculator to estimate token cost for OpenAI, Claude,...	13	Experimental	—	—
37	UsmanBuk/prompt-budget-guard CLI preflight guardrail for LLM prompt token and cost budgets	11	Experimental	—	Python
38	sarkar-dipankar/llm-prompt-compression This repository serves as a structured survey of prompt compression...	10	Experimental	1	—

Comparisons in this category

toon and t3-toon (41 vs 38)