Free, open tools built for developers. No sign-up required.
Compare costs across 25+ AI models from Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, and xAI.
Open tool →Estimate token counts for GPT, Claude, and Gemini models. See character count, word count, and cost estimates.
Open tool →Interactive comparison of 25+ AI models. Filter by features, compare context windows, pricing, and capabilities side by side.
Open tool →Calculate the full cost of a RAG pipeline: document embedding, vector storage, and LLM generation.
Open tool →Build effective system prompts step by step. Choose persona, tone, output format, and constraints for any AI model.
Open tool →Browse 40+ curated prompt templates for coding, writing, data analysis, and more. Customize placeholders and copy for any AI model.
Open tool →Compress and optimize AI prompts to reduce token usage. Remove filler words, shorten phrases, and see cost savings across models.
Open tool →Scan code and config files for accidentally exposed API keys. Detects 15+ providers. 100% local.
Open tool →Encode text to Base64 or decode Base64 back to plain text. Full Unicode support, runs in your browser.
Open tool →Generate cryptographically random v4 UUIDs. Single or bulk generation up to 50 with one-click copy.
Open tool →Paste JSON to format, validate, and minify. Syntax highlighted output with error detection.
Open tool →Decode and inspect JSON Web Tokens — header, payload, signature, and expiration status.
Open tool →Convert colors between HEX, RGB, and HSL formats. Visual picker, complementary color, and copy buttons.
Open tool →Complete HTTP status codes reference with descriptions, common use cases, and one-click copy.
Open tool →Test regex patterns with live highlighting, match groups, and common pattern presets.
Open tool →Convert Unix timestamps to dates and back. Live clock, relative time, ISO 8601, UTC, and local formats.
Open tool →Build cron schedules visually with dropdowns, presets, human-readable descriptions, and next execution times.
Open tool →50+ essential Git commands organized by category. Search by what you want to do and copy with one click.
Open tool →Build docker-compose.yml visually. Presets for PostgreSQL, Redis, MongoDB, Nginx, and more.
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