About PromptTools.dev
A free platform for anyone who uses AI — built to help you write better prompts, get better results, and understand what's actually happening under the hood.
AI-Powered Tools
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Prompt Tester
Test any prompt on 6 real AI models and see the output instantly.
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Prompt Optimizer
Rewrite your prompt in 14 styles — concise, persuasive, technical, and more.
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Prompt Analyzer
Score your prompt across clarity, specificity, structure, and context.
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Model Compare
Run the same prompt on 2 models side by side and compare outputs.
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AI Humanizer
Make AI-generated text sound natural and human-written.
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Email Reply Generator
Get 3 ready-to-send email replies from any email you receive.
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System Prompt Generator
Build production-ready system prompts with role, constraints, and guardrails.
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Meeting Notes / MOM
Turn raw meeting notes into structured Minutes of Meeting.
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Image to Prompt
Upload an image and get AI prompts that would recreate it.
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AI Resume Builder
Build ATS-optimized resumes with AI suggestions and keyword optimization.
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Token Calculator
Estimate token count and cost across all major AI models.
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Prompt Library
100+ high-quality, ready-to-use prompts for every use case.
Developer Utilities
22 free client-side utilities for developers — no API calls, no rate limits, instant results.
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JSON Formatter
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Base64 Encoder
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URL Encoder
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JWT Decoder
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HTML Minifier
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CSV to JSON
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YAML to JSON
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Regex Tester
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Word Counter
Aa
Case Converter
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Password Generator
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Age Calculator
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Days Between Dates
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Unix Timestamp
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Slug Generator
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Meta Tag Generator
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Keyword Density
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Remove Line Breaks
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Remove Extra Spaces
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Reverse Text
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Remove Duplicates
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Sort Lines
Have a question or feedback?
We'd love to hear from you — whether it's a bug report, a feature idea, or just a hello.
Get in Touch