Free Online Tools
38 free tools that run entirely in your browser · no sign-up · your data never leaves your device
🏭 Token Factory
Complete GPU-to-Token toolchain: model selection, cost planning, prompt engineering, deployment optimization
Token Counter
Multi-model token counting and cost estimation for GPT, Claude, Llama, Qwen and DeepSeek
Token Cost Calculator
Compare LLM API pricing across providers and estimate costs
VRAM Estimator
Estimate GPU memory requirements based on model size, quantization and context length
Self-Host vs API Breakeven
Calculate the breakeven point between GPU rental/ownership and API calls
Prompt Template Editor
Manage, test and version prompt templates with variable substitution
Context Window Planner
Visually allocate token budgets for system, user and assistant messages
GPU Selector
Recommend GPU configurations based on model size and concurrency requirements
LLM Deployment Checklist
Interactive phased checklist for LLM deployment (hardware, software, model, security)
Quantization Comparison
Compare FP16, INT8, INT4, GGUF, AWQ and GPTQ for quality, speed and compatibility
Inference Engine Comparison
Compare vLLM, SGLang, TensorRT-LLM and llama.cpp features and use cases
🛠️ Developer Tools
Code formatting, conversion and debugging utilities
JSON / YAML / Regex Toolbox
Format & validate JSON, convert between YAML and JSON, live regex tester
SQL Formatter + Charts
Beautify SQL and turn query results into charts
Schema Markup Generator
JSON-LD structured data for FAQ, Product, Review and Article
GIF Toolkit
Inspect GIF info, preview frames and export PNGs, all locally
Markdown to PDF
Render Markdown into beautifully typeset printable pages
Local PDF Editor
Reorder, rotate and delete pages, add text, highlights, signatures, page numbers and watermarks — all locally in your browser
⚡ Productivity
Productivity tools for work, e-commerce and content creation
Keyword Clustering
Expand seed keywords into long-tail keywords and content clusters
Shipping & Tax Calculator
Cross-border shipping, customs duty and VAT estimation
Size Converter
Clothing & shoe size conversion across US / EU / UK / JP / CN systems
PDF Merge / Split / Compress
Merge, split and compress PDFs locally in your browser
Resume ATS Checker
Check resume keyword match and ATS-friendliness against a job description
Contract Risk Highlighter
Paste contract text to flag risky clauses by severity
Logo Generator
Quick logo maker with text + shapes and vector SVG export
Social Image Generator
Generate images in 10 platform sizes from one text input
Screenshot Beautifier
Rounded corners, shadows and gradient backgrounds for screenshots
Color Accessibility Checker
WCAG contrast ratio calculation and color-blind simulation
Crypto Tax Report
Aggregate exchange CSVs, FIFO cost basis and annual tax report
Unit / Timezone / Calendar Converter
Industry unit, timezone and calendar conversions in one place
Anki Card Generator
Turn notes or articles into Anki flashcards and export
Worksheet Generator
Math and vocabulary printable worksheets for kids
Sentence Miner
Extract example sentences from subtitle files, filter by difficulty
Habit Tracker
Minimal habit check-ins with streaks and a heatmap dashboard
Subscription Manager
Track subscription spending, with renewal reminders and yearly cost analysis
Event Planner
Budget management and checklists for weddings and events
Launch Checklist Generator
Product launch checklists and a directory submission list
Legal Doc Generator
Privacy policy and ToS templates by jurisdiction
Shoe & Clothing Size Chart
Global shoe size, clothing size and height reference conversion tables
2026 Public Holiday Calendar
Browse 2026 public holidays across 16 countries with next-holiday countdown