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. The highest-rated is connectaman/LoPace at 49/100 with 3 stars and 213 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...	49	Emerging	3	Python
2	roli-lpci/lintlang Static linter for AI agent tool descriptions, system prompts, and configs....	49	Emerging	4	Python
3	LakshmiN5/promptqc ESLint for your system prompts — catch contradictions, anti-patterns,...	45	Emerging	1	Python
4	sbsaga/toon TOON — Laravel AI package for compact, human-readable, token-efficient data...	37	Emerging	57	PHP
5	chatde/tokenshrink Same AI, fewer tokens. Free forever. — tokenshrink.com	35	Emerging	7	JavaScript
6	thesupermegabuff/megabuff-cli 🤖 CLI for Better prompts, transparent costs, & zero vendor lock-in. Optimize...	35	Emerging	5	JavaScript
7	martc03/PromptCommit Git for your prompts. Version control, A/B test, and iterate on LLM prompts...	34	Emerging	3	Python
8	nooscraft/tokuin CLI tool – estimates LLM tokens/costs and runs provider-aware load tests for...	34	Emerging	128	Rust
9	therohanparmar/t3-toon TOON for TYPO3 — a compact, human-readable, and token-efficient data format...	34	Emerging	4	PHP
10	study8677/PromptLint PromptLint — Lint prompts for robustness across models and temperatures.	32	Emerging	5	Python
11	smixs/ZPL-80 Zip Prompt Language - compress heavy system prompts by ≥ 80 % token reduction	27	Experimental	15	—
12	Mattbusel/Token-Visualizer The ultimate tool for analyzing, visualizing, and optimizing your LLM prompts	27	Experimental	9	Python
13	pavanvamsi3/prompt-cop A light weight library prompt-cop scans text files in your project for...	24	Experimental	8	JavaScript
14	metawake/prompt_compressor Compresses LLM prompts while preserving semantic meaning to reduce token...	23	Experimental	8	Python
15	scottconverse/promptlint Static analysis for LLM prompts. 34 rules, auto-fix, CI-ready. The ESLint...	22	Experimental	—	Python
16	yoyo11q8/megabuff-cli 🤖 Optimize AI prompts, uncover costs, and ensure vendor freedom across...	22	Experimental	—	JavaScript
17	Camj78/Cost-Guard-AI CostGuardAI — an AI prompt preflight SaaS that predicts token usage, cost,...	22	Experimental	—	TypeScript
18	KurtWeston/token-count Calculate token counts for text using various LLM tokenizers to estimate API...	22	Experimental	—	Rust
19	llmhut/llm-diff See token count changes, cost deltas, latency shifts, and a word-level diff...	22	Experimental	—	JavaScript
20	Yashwanth9394/tokenpack Pack JSON data into token-efficient formats for LLM prompts. Save 37-47% on...	22	Experimental	—	Python
21	bgerd/promptlab Version control for AI prompts — track iterations with session history,...	22	Experimental	—	Shell
22	yuechen-li-dev/GenerativeCompressionProtocol The first model-native prompt compression protocol	20	Experimental	1	—
23	aredesrafa/logslimmer Save massive token costs while coding or vibe-coding by semantically...	20	Experimental	1	JavaScript
24	maxh33/VTT-to-Insights Turn raw .vtt lecture files into clean, AI-ready transcripts. Removes UUID...	19	Experimental	—	Python
25	getkaizen/kaizen-sdk Open source client SDKs to Save AI cost via Kaizen AI Cost Optimization...	18	Experimental	4	MDX
26	chirindaopensource/compact_prompt_unified_pipeline_prompt_data_compression_LLM_workflows End-to-End Python implementation of CompactPrompt (Choi et al., 2025): a...	17	Experimental	2	Jupyter Notebook
27	Mattbusel/tokenviz TokenViz — A CLI tool to visualize token usage in OpenAI prompts, helping...	16	Experimental	2	Python
28	RudraDudhat2509/diffprompt git diff for prompt engineers	15	Experimental	1	Python
29	jedick/noteworthy-differences Noteworthy differences between revisions of Wikipedia articles: an AI...	15	Experimental	—	Python
30	ddaverse/llm-token-counter Free online LLM Token Counter to estimate token usage and API cost for...	14	Experimental	—	—
31	JamCatAI/prompt-lint Static analyzer for LLM prompts — catch injection risks, vague instructions,...	14	Experimental	—	Python
32	UsmanBuk/prompt-budget-guard CLI preflight guardrail for LLM prompt token and cost budgets	14	Experimental	—	Python
33	Reprompts/repmt repmt is a lightweight Python library that automatically parses large Python...	14	Experimental	3	Python
34	LakshmiSravyaVedantham/token-diet Compresses prompts to use fewer tokens without losing meaning — saves up to...	11	Experimental	—	Python
35	g14ayushi/JSONizer JSONizer is an LLM-powered system that converts unstructured business text...	11	Experimental	—	Python
36	ashwin400/prompt-lint Static analyzer for LLM prompts. Scores 0-100, finds vague language, missing...	11	Experimental	—	Python
37	ddaverse/ai-prompt-cost-tracker Free AI Prompt Cost Calculator to estimate token cost for OpenAI, Claude,...	11	Experimental	—	—
38	korchasa/promptlint Prompt Linter	11	Experimental	2	Go

Comparisons in this category

toon and t3-toon (37 vs 34)