Available tool
Base64 Encoder / Decoder
Encode text to Base64 and decode Base64 back to readable text locally in your browser.
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Fast browser-based developer tools
Small, privacy-conscious utilities for backend developers. Inputs run locally in the browser.
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Big-O Cheat Sheet
Look up common Big-O complexities for Java collections, algorithms, and backend patterns with a fast browser-based reference table.
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Cron Parser
Explain standard five-field cron expressions and preview upcoming run times locally in your browser.
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CSV to JSON Converter
Convert CSV, TSV, or delimited text to JSON locally in your browser for API mocks, imports, fixtures, and documentation.
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HTTP Status Code Lookup
Search common HTTP status codes locally in your browser with REST API usage notes, retry guidance, and backend examples.
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JSON Formatter
Format, validate, minify, and copy JSON locally in your browser without sending input to a server.
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JSON Pointer Resolver
Resolve RFC 6901 JSON Pointers against JSON locally in your browser for OpenAPI, JSON Schema, JSON Patch, and API debugging.
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JSON Schema Generator
Generate a starter JSON Schema from example JSON locally in your browser for API contracts, validation, tests, and documentation.
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JSON to TypeScript Types Generator
Generate TypeScript interfaces or type aliases from JSON locally in your browser for API responses, fixtures, and backend contracts.
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JSONPath Tester
Test common JSONPath expressions against JSON locally in your browser for API debugging, fixtures, logs, and documentation.
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JWT Decoder
Decode JWT header and payload claims locally in your browser without uploading tokens or verifying signatures.
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Markdown Table Generator
Convert CSV, TSV, or pasted rows into Markdown tables locally in your browser for READMEs, API docs, technical notes, and reports.
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Regex Tester
Test JavaScript regular expressions locally with flags, matches, capture groups, and replacement previews.
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SQL Formatter
Format, minify, and copy SQL queries locally in your browser for easier backend debugging, code review, and documentation.
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Text Diff Checker
Compare two text snippets locally in your browser with line-by-line differences for JSON, SQL, config files, logs, and API responses.
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Unix Timestamp Converter
Convert Unix timestamps to UTC and local dates, or convert date strings to seconds and milliseconds locally in your browser.
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URL Encoder / Decoder
Encode full URLs, encode query parameters, and decode percent-encoded URL strings locally in your browser.
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UUID Generator
Generate UUID v4 values locally in your browser for request IDs, idempotency keys, database records, and test data.
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