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Page not found.
The page you requested doesn't exist, or it has moved. This can happen if you followed an old link, typed the URL incorrectly, or if the page was renamed during a site update. Try the homepage or browse all tools to find what you need. All of our developer tools are accessible from the tools directory, organised by category for easy discovery.
Common pages people look for.
YAML to JSON
Convert YAML configuration files to JSON format. Widely used for transforming Kubernetes manifests, Docker Compose files, and CI/CD pipeline configurations into JSON for API consumption or tooling that requires JSON input.
JSON formatter
Beautify and validate JSON data with syntax highlighting. Paste minified JSON from an API response and get a properly indented, readable version. Useful for debugging API payloads, reviewing configuration files, and sharing data with teammates.
JWT decoder
Decode and inspect JSON Web Tokens without sending them to an external server. View the header, payload, and signature of any JWT. Essential for debugging authentication flows, verifying token claims, and understanding what data is being transmitted.
Base64 converter
Encode and decode Base64 strings instantly. Useful for inspecting email attachments, decoding API credentials embedded in environment variables, and understanding the contents of opaque data payloads.
Cron expression generator
Build cron expressions for scheduling tasks. Translate human-readable time intervals into the correct cron syntax. Great for setting up recurring jobs in CI/CD pipelines, server maintenance windows, and automated report generation.
UUID generator
Generate v4 UUIDs for use as unique identifiers. Ideal for creating database primary keys, session tokens, request IDs, and any scenario where you need a globally unique value that won't collide with existing records.
What you can do from here.
DevSpeedTools hosts over 60 developer utilities, all running entirely in your browser. Whether you need to convert a YAML file to JSON for a deployment script, format a JSON payload returned by an API, decode a JWT token to inspect its claims, or generate a UUID for a new database record, there is a tool designed for that task. Every tool processes your data locally — nothing you paste is uploaded to a server, so you can safely work with configuration files, API keys, and sensitive data.
If you were looking for a specific tool and landed on this page, the URL may have changed or a typo might be the culprit. The quickest way to find what you need is to use the tools directory, which lists every available tool organised by category. You can also use the search bar at the top of the page to find tools by name or functionality. If you believe this page should exist, please report the broken link so we can fix it.
All tools on DevSpeedTools run entirely in your browser, so your data never leaves your device. This makes them safe for working with API keys, database credentials, and other sensitive configuration values. Bookmark the tools directory for quick access whenever you need a developer utility.