Tools directory
Developer Tools Directory
Search all available tools, filter by category, and open complete browser-local utilities for common developer workflows.
Need background before choosing a workflow? Read the developer guides for practical notes on identifiers, JSON, JWTs, timestamps, hashes, URLs, passwords, and safe browser-based tools.
31
Tools
10
Categories
Local
Processing
UUID Generator
Create random or time-ordered UUIDs with formatting controls.
Open toolUUIDUUID v4 Generator
Generate RFC-style random UUID v4 identifiers.
Open toolUUIDUUID v7 Generator
Create time-ordered UUID v7 identifiers.
Open toolUUIDBulk UUID Generator
Generate large UUID batches for fixtures, imports, and tests.
Open toolJSONJSON Formatter
Pretty print JSON and make nested data easier to read.
Open toolJSONJSON Validator
Check JSON syntax and view a formatted valid preview.
Open toolJSONJSON Minifier
Remove unnecessary whitespace from valid JSON.
Open toolJSONJSON to String
Escape JSON or text for use inside strings and reverse it when needed.
Open toolEncodingBase64 Encode
Encode Unicode text into Base64 safely in your browser.
Open toolEncodingBase64 Decode
Decode Base64 into readable Unicode text.
Open toolEncodingJWT Decoder
Decode JWT header and payload without sending tokens to a server.
Open toolTimeUnix Timestamp Converter
Convert timestamps and dates in seconds or milliseconds.
Open toolTimeCron Expression Generator
Create common 5-field cron expressions with local explanations.
Open toolHashingSHA-256 Generator
Create SHA-256 hashes from text with native browser cryptography.
Open toolHashingMD5 Generator
Create MD5 hashes for legacy checksum use cases.
Open toolURLURL Encode
Encode full URLs or URL components with native browser functions.
Open toolURLURL Decode
Decode percent-encoded URL text safely in your browser.
Open toolSecurityPassword Generator
Generate strong random passwords locally with browser cryptography.
Open toolJSONJSON String Escape
Escape arbitrary text as a valid JSON string literal.
Open toolJSONJSON String Unescape
Decode a JSON string literal into readable text.
Open toolDiagramMermaid Diagram Renderer
Write Mermaid source, preview a sanitized diagram, and export SVG or PNG.
Open toolYAMLYAML Validator
Validate YAML syntax with normalized line and column issues.
Open toolYAMLYAML Formatter
Parse and format YAML while preserving comments where the parser supports them.
Open toolYAMLYAML to JSON Converter
Convert supported YAML mappings and sequences to valid JSON.
Open toolYAMLJSON to YAML Converter
Convert valid JSON objects, arrays, and primitives to safe YAML.
Open toolAPIOpenAPI Viewer
Explore local OpenAPI 3.x YAML or JSON by tag, path, operation, and schema.
Open toolAPIOpenAPI Validator
Validate OpenAPI 3.x syntax, required structure, operations, and local references.
Open toolAPIOpenAPI Endpoint Extractor
Create a searchable endpoint inventory and export CSV, JSON, or Markdown.
Open toolAPIOpenAPI to Markdown
Generate configurable Markdown documentation from a local OpenAPI 3.x document.
Open toolHashingHash Generator
Generate SHA-256, SHA-1, or MD5 digests for text and local files and compare known values.
Open toolTimeCron Expression Explainer
Explain a five-field cron expression and preview upcoming runs in a selected timezone.
Open tool