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Developer Tools

Everyday developer utilities for data, encoding, and passwords.

HTML Entity Encoder

Encode text as HTML entities for safe display.

Developerhtml entity encoderdeveloper
HTML Entity Decoder

Decode HTML entities back into readable text.

Developerhtml entity decoderdeveloper
CSS Unit Converter

Convert px, rem, em, and percent values using a base size.

Developercss unit converterdeveloper
REM PX Converter

Convert rem values to pixels and pixels to rem.

Developerrem px converterdeveloper
JSON Minifier

Minify JSON by removing whitespace after validation.

Developerjson minifierdeveloper
JSON to CSV Converter

Plan a simple JSON to CSV conversion from array data.

Developerjson to csv converterdeveloper
CSV to JSON Converter

Plan a simple CSV to JSON conversion from pasted rows.

Developercsv to json converterdeveloper
YAML to JSON Converter

Prepare YAML-to-JSON conversion checks and output notes.

Developeryaml to json converterdeveloper
JSON Schema Generator

Draft a basic JSON schema from example object fields.

Developerjson schema generatordeveloper
API Request Builder

Prepare method, URL, headers, and body for an API request.

Developerapi request builderdeveloper
HTTP Status Code Lookup

Look up common HTTP status code meaning and handling notes.

Developerhttp status code lookupdeveloper
MIME Type Lookup

Find common MIME type notes for file extensions.

Developermime type lookupdeveloper
Cron Expression Helper

Explain a cron schedule and prepare a timing checklist.

Developercron expression helperdeveloper
Color Contrast Checker

Estimate contrast notes between foreground and background colors.

Developercolor contrast checkerdeveloper
CSS Clamp Calculator

Create CSS clamp values from min, max, and viewport assumptions.

Developercss clamp calculatordeveloper
Viewport Size Calculator

Calculate viewport-related dimensions for responsive layouts.

Developerviewport size calculatordeveloper
File Hash Checklist

Prepare a file hash verification checklist before sharing files.

Developerfile hash checklistdeveloper
Semantic Version Comparator

Compare semantic versions and identify upgrade direction.

Developersemantic version comparatordeveloper
Changelog Generator

Draft a changelog section from feature, fix, and breaking-change notes.

Developerchangelog generatordeveloper
Release Notes Generator

Draft release notes from changes, audience, and rollout notes.

Developerrelease notes generatordeveloper