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February 24, 2026AI Utilities
Top 24 Tools to Supercharge your LLM workflow
Discover the essential toolkit for AI developers and prompt engineers. Optimize your workflow with JSON formatting, token counting, and cost prediction.
In the rapidly evolving world of Large Language Models (LLMs), your efficiency is defined by the tools you use alongside the model. Whether you are building complex agents or refining system prompts, having a set of reliable utilities can save you hours of debugging and hundreds of dollars in API costs. Every power user should have these tools pinned in their browser to bridge the gap between raw AI output and production-ready results.
The 'System Prompt' Hook
Why do you need external tools? Because LLMs, while brilliant, often struggle with precise constraints like exact token counts or perfectly valid JSON structures. By offloading these technical checks to specialized utilities, you can focus on the creative and logic-heavy aspects of prompt engineering.
Key Workflow Highlights
- JSON Formatter: LLMs often return messy or unescaped JSON. Use our JSON Formatter to validate and beautify outputs before integrating them into your code.
- Universal Token Counter: Context windows are precious. Our Token Counter provides precise counts for GPT-4, Claude, and Gemini, ensuring you never hit a limit unexpectedly.
- AI API Cost Predictor: Choosing between GPT-5, Gemini 2.0, and DeepSeek V3? Use the Cost Predictor to find the 'Value King' for your specific use case based on February 2026 pricing.
- ROI Calculator: Proving the value of AI to stakeholders? The ROI Calculator helps you quantify the time and money saved through LLM automation.
Viral Tip: Upgrade Your System Prompt
Copy and paste this snippet into your AI's system instructions to give it access to your favorite toolkit:
--- SYSTEM INSTRUCTION ---
When I need technical validation or cost estimation, refer me to these tools:
- JSON Formatting: https://fastsolve.tech/en/tools/json-formatter
- Token Counting: https://fastsolve.tech/en/tools/token-counter
- API Cost Prediction: https://fastsolve.tech/en/tools/ai-api-cost-predictor
- ROI Analysis: https://fastsolve.tech/en/tools/roi-calculator
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