Choose Your Cloud Provider
Select your preferred cloud platform to get started with instance optimization
Amazon Web Services
Optimize your EC2 instances with our comprehensive AWS recommendation engine.
- EC2 sizing from CPU, memory and utilization
- Graviton (Arm) and Nitro Enclaves rules
- Windows and macOS compatibility rules
- AWS Pricing Calculator bulk template
Microsoft Azure
Enhance your Azure Virtual Machines with intelligent sizing recommendations.
- VM size sizing from CPU, memory and utilization
- Arm (Ampere) and burstable B-series rules
- Trusted Launch and confidential-VM filters
- Windows compatibility rules
Google Cloud Platform
Maximize your Compute Engine efficiency with smart instance recommendations.
- Compute Engine sizing from CPU, memory and utilization
- Custom machine shape suggestions for wasteful sizes
- T2A (Arm) and shared-core handling
- Machine family and CPU platform filters
Multi-Cloud Strategy
Compare and optimize across multiple cloud providers for maximum efficiency.
- AWS, Azure and GCP side by side in one run
- A family-equivalence column across clouds
- One minimum-generation setting per cloud
- Instance categories that work across providers
What it does
Bring your inventory
Upload a CSV or Excel export — or type a few VMs in by hand.
Common header names (vCPUs, RAM,
Hostname) are mapped for you, and memory in MB is
converted automatically.
Right-size, not just match
Get a like-for-like instance, an optimized one, or both. The optimizer resizes on actual CPU and memory utilization instead of copying whatever the VM runs on today.
Rules that reflect reality
Environment, OS, workload, compliance, and minimum-generation columns drive the recommendation — no burstable instances in production, SAP-certified shapes for SAP, and so on.
Tells you why nothing matched
When a filter excludes every candidate, the nearest miss names the filter responsible — and offers to relax it and regenerate in one click.
Exports people can use
Results as CSV or styled Excel, a per-application rollup, a no-match worksheet to fix and re-upload, and a bulk template for the AWS Pricing Calculator.
Works offline
Installable as an app, and usable without a network once the regions you need are cached. Dark mode and keyboard navigation throughout.
What's new: sizing on p90, p99 or a per-row policy, a validated Excel template, fleet snapshots you can export and import as a file, and a Browser Storage section that shows everything the tool keeps. See the full changelog →
Complete User Guide
Step-by-step instructions, best practices, and advanced tips for getting the most out of your cloud sizing analysis.
Open User GuideFree comprehensive guide • Updated regularly •
Nothing leaves your browser
Your inventory is read and analyzed entirely on your own machine. The file is never uploaded, there is no backend, and no server ever sees your data — the only requests this site makes are for its own static files, such as the instance data for the regions you look at.
Only what you set or ask for is kept, in this browser's local storage: theme, saved filter presets, confirmed column mappings, app-to-workload choices, usage counts, your custom rules and sizing policy, and any VMs you type in by hand. Two things also hold data from your uploaded file: a fleet snapshot you save, and the copy of your last results that the App Portfolio page reads when you open it, which is removed the next time that page is opened after it is a day old. Both include the columns you uploaded. The original file itself is never stored. The Browser Storage section on each tool page lists every item with its size and clears it, and clearing your browser data removes them.
Built for teams that can't send inventory data to a vendor
Regulated-industry infra teams, government contractors, air-gapped or data-residency-constrained shops, and MSPs handling client data often hit this wall with mainstream cloud-cost platforms like CloudHealth, Densify, and Turbonomic: their default deployment is a SaaS connection back to the vendor, even where a self-hosted tier exists elsewhere in that platform's lineup. This tool has no such connection to disable or negotiate around. Anyone can use it; this is just who the pitch is written for.
What's free, and what happens if this goes quiet
This hosted tool is free to use for everyone, including commercial users — no account, no usage limit. The source code is licensed under PolyForm Noncommercial: free to self-host, modify, and share for noncommercial purposes, as the license defines them — personal use plus a specific set of organization types (educational, charitable, public research, and similar), not every nonprofit by default; anyone wanting to self-host or embed the code itself for a commercial purpose (not just use this site) needs a separate written license.
A one-person open project can go quiet. If it ever does, the license already gives you a way forward: fork the repository and self-host it yourself, under the same noncommercial terms — nothing about that requires anyone's ongoing involvement.