AI & LLM Tools
14 tools for working with AI-generated text and large language models: humanizing, detecting, counting tokens, building prompts, and more. All run entirely in your browser.
AI Humanizer
Transform AI-generated text into natural, human-sounding writing. Removes robotic patterns, adds contractions, varies sentence structure.
AI Detector
Analyze text for AI-generated patterns using heuristic scoring: sentence uniformity, vocabulary richness, formal phrasing, and more.
Token Counter
Count tokens for GPT-4, Claude, Llama, and Gemini models. See context window usage, cost estimates, and character/word stats.
Prompt Builder
Compose structured prompts with system message, user turn, few-shot examples, and output format. Export as JSON or plain text.
Tone Rewriter
Rewrite text in a different tone: formal, casual, professional, friendly, persuasive, or simplified. Instant side-by-side comparison.
Text Summarizer
Extractive summarization using TF-IDF sentence scoring. Condense any article or document to key sentences in seconds.
Readability Analyzer
Score text with Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, and SMOG. Get detailed stats on sentences, words, and syllables.
Prompt Library
Save, organize, tag, and reuse your best prompts locally. Search by tag or keyword: stored entirely in your browser, no account needed.
Prompt Optimizer
Score and improve your prompts with 7 heuristic checks: specificity, role assignment, output format, constraints, and more. Auto-generates an optimized
JSON → JSONL
Convert JSON arrays to JSONL (JSON Lines) format for LLM fine-tuning. Supports OpenAI Chat, OpenAI Completion, and Anthropic presets. Reverse mode
YAML → Pydantic
Generate Pydantic v1/v2 model classes from YAML structures. Infers Python types automatically with optional fields toggle and nested class support.
Python Formatter
Format Python code with PEP 8 rules: fix indentation, blank lines, operator spacing, comment style, and trailing whitespace: no server required.
Stopwords Remover
Strip common NLP stopwords from text for cleaner embeddings and keyword extraction. English built-in with case-sensitive toggle and removal stats.
Voice Script Helper
Format scripts for TTS and voice-over narration: expand abbreviations, convert numbers to words, add pause markers, and make URLs speakable.
Frequently Asked Questions
- Do the AI writing tools call an external API like OpenAI?
- No. All AlteredIdea tools are self-contained and run locally. The writing and analysis features process the input you provide using local algorithms: there's no remote model being called.
- What's the token counter useful for?
- Estimating the token cost of a prompt before sending it to a language model API. If you're working with GPT-4, Claude, or similar, this helps you stay within context window limits and keep API costs predictable.
- What does the AI detector actually check?
- It analyzes patterns: sentence uniformity, perplexity, burstiness: that tend to differ between human and AI-generated writing. Treat the result as an indicator, not a definitive verdict.
- What is the prompt optimizer doing to my prompt?
- It restructures your prompt to be more specific and clear: adding context, improving formatting for the model type you select, and cutting vague language. You still review and edit the result before using it.
- Can the summarizer handle long documents?
- It works best on text you paste in directly. For very long documents, paste the most relevant sections rather than the entire thing for better, more focused output.