The Swiss Army Knife for Developers
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Developer tool guides
Online Developer Tools
A privacy-first collection of fast browser-based utilities for APIs, JSON, webhooks, encoding, security, text, and frontend debugging.
JSON Tools
Format, validate, compare, convert, query, and inspect JSON data used in APIs, logs, webhooks, and config files.
API and Webhook Tools
Capture requests, test webhooks, convert curl commands, inspect HTTP status codes, and debug API integrations.
Encoding Tools
Encode, decode, escape, parse, and normalize text used in URLs, HTML, Base64 payloads, and web forms.
Security and Auth Tools
Decode JWTs, generate hashes, compute HMAC signatures, check password strength, and inspect auth-related development data.
Text Tools
Compare, clean, transform, dedupe, preview, and generate text for developer documentation and debugging workflows.
SEO and Web Tools
Preview metadata, generate robots.txt files, parse URLs, format CSS and JavaScript, and prepare frontend snippets.
Network and Browser Tools
Inspect DNS, IP information, user agents, HTTP status codes, and browser-facing debugging data.
JSON / XML
JSON Formatter
Format, validate, and minify JSON data.
JSON Diff
Compare two JSON objects side-by-side.
Format Converter
Convert between JSON, YAML, and XML.
CSV to JSON
Convert CSV to JSON arrays.
JSON Path
Evaluate JSONPath selectors.
XML Formatter
Pretty print XML.
CSV Viewer
View and search CSV files.
JSON Validator
Validate Schema (Ajv).