Rocket Dev Tools
Rocket Dev Tools is a free, browser-based collection of over 140 developer utilities and calculators focused on privacy and convenience. The suite is organized into three main areas: Architecture Suite, AI Tools, and Utilities. Architecture Suite covers cloud architecture and system design with calculators for Postgres limits, Redis sizing, Kafka partitions, Kubernetes bin-packing, Lambda power, DynamoDB capacity, S3 vs Glacier, load balancer visualization, and many more. AI Tools includes token counters, prompt engineering helpers, JSON schema generators, RAG/vector database sizers, embedding cost calculators, PII redaction, and LLM cost/latency estimators. Utilities provides everyday developer tools such as a regex tester, diff checker, and case converter. All tools run entirely in the browser. The site states that there is no backend, no uploads, and zero telemetry, meaning user data never leaves the device. This makes Rocket Dev Tools suitable for working with sensitive code, keys, JWTs, or other data that developers may not want to share with a remote server. The tools are free to use and do not require an account or installation. The platform is designed for developers, ML engineers, and architects who need quick, practical calculations and conversions during design, debugging, or cost estimation. It combines cloud cost math, AI/LLM planning, and general text/format utilities in one place, reducing the need to switch between many single-purpose websites.
- Category
- Apis
- Pricing
- Free
Problem solved
Developers often need quick, trustworthy utilities and sizing calculations but are wary of uploading sensitive data to online tools. Rocket Dev Tools solves this by providing a broad set of browser-only developer tools that run locally, with no backend, no uploads, and zero telemetry, so users can calculate cloud costs, decode JWTs, redact PII, or test regex without compromising privacy.
Use cases
- Estimating cloud infrastructure costs and capacity for Postgres, Redis, Kafka, Kubernetes, DynamoDB, and other services
- Decoding JWTs and generating keys entirely in the browser without sending data to a server
- Counting tokens and visualizing context windows for LLM prompts
- Building and comparing prompts, JSON schemas, and function/tool schemas for AI applications
- Redacting PII and secrets from text before sharing or logging
- Testing regular expressions and comparing text diffs
- Sizing AI infrastructure such as vector databases, embedding costs, and fine-tuning GPU VRAM
Audience
- Developers
- ML Engineers
- Data Scientists
- Startups
- Researchers
Pros
- Free to use with no account required
- Privacy-focused: no backend, no uploads, zero telemetry
- Covers a wide range of developer, cloud architecture, and AI/LLM tools
- Runs entirely in the browser for convenience
- Useful for sensitive data like JWTs, keys, and PII
Cons
- Requires a modern web browser and internet connection to load the site
- Calculators provide estimates and may not reflect official pricing or service limits
- No offline desktop application or API access mentioned
Official website: https://rocketdevtools.com/
Canonical LambdaBase page: https://www.lambdabase.com/tools/rocket-dev-tools