Free tools

Free DynamoDB Tools

Estimate cost, size your items, convert between JSON formats, and build expressions — instantly and entirely in your browser. No sign-up, no data leaves your machine.

DynamoDB Pricing Calculator

Estimate monthly DynamoDB cost across every AWS region — On-Demand vs Provisioned, side by side, with the free tier applied.

DynamoDB Item Size Calculator

Paste JSON to get the exact item size in bytes and the read/write capacity units it consumes.

DynamoDB JSON Converter

Convert plain JSON to DynamoDB-JSON (attribute-value format) and back, entirely in your browser.

DynamoDB Expression Builder

Build key conditions, filters, update expressions, and conditional writes visually — copy them as AWS SDK v3, CLI, boto3, or PartiQL.

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Our guides explain the concepts behind these tools, and the docs cover DynoTable itself.

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