Developer Tools Calculators & Tools
Formatters, encoders, regex testers, and color converters built for developers. Built to run completely client-side in your browser for total privacy, zero data collection, and instant calculations.
Available Developer Tools Tools
JSON Formatter & Validator
Beautify, minify, and validate JSON with syntax highlighting and optional schema validation.
Regex Tester
Test and debug regular expressions with live match highlighting, capture group extraction, and plain-English pattern explanation.
UUID/GUID Generator
Generate v1, v4, and v7 UUIDs in bulk with options for casing, dashes, and copy-to-clipboard.
Base64 Encoder/Decoder
Encode and decode Base64 strings, images, and files with drag-and-drop support and data URI preview.
Diff Checker
Compare text and code side-by-side or inline with line-level and word-level diff highlighting.
Color Picker & Converter
Pick, convert, and analyze colors with HEX/RGB/HSL support, WCAG contrast checker, palette generator, and CSS gradient builder.
Subnet Calculator
Calculate network address, broadcast, subnet mask, usable host ranges, and wildcard masks for IPv4/IPv6 CIDR blocks.
CSS Minifier / Beautifier
Minify or beautify your CSS stylesheets, strip comments, and visualize code compression metrics.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files — all client-side.
JWT Decoder & Validator
Decode and validate JSON Web Tokens, inspecting the header, payload claims, and signature safely in your browser.
Markdown to HTML Converter
Convert Markdown to HTML with a live preview, GitHub Flavored Markdown support, and copy/download options.
Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps with seconds/milliseconds, timezones, and relative time.
URL Encoder / Decoder
Percent-encode and decode URLs with live preview, byte counts, and query-string quick actions.
SQL Formatter & Beautifier
Format, beautify, and minify SQL queries across PostgreSQL, MySQL, SQLite, T-SQL, and Oracle dialects.
JavaScript Formatter & Minifier
Beautify, indent, and compress JavaScript code with line count and file size reduction analytics.
cURL to Fetch Converter
Convert cURL commands directly into modern JavaScript fetch API code (async/await and Promises).
Cron Expression Generator
Build custom 5-part cron expressions visually with live plain-English schedule translations and presets.
Cron Expression Parser
Parse 5-part cron syntax into plain English with a schedule breakdown and next 10 execution dates.
Developer Tools Guides & Technical Comparisons
In-depth references, mathematical formulas, and technical comparisons related to developer tools calculations.
Explore Other Categories
Finance & Loans
Calculate mortgage payments, loan rates, self-employment taxes, and interest compound growths.
Real Estate & Mortgage
Determine affordability, refinance benefits, and rental property yields.
Everyday / Life Utility
Secure, local random password generators, instant age calculations, and QR codes.
Text & Content
Word counters, text diff comparers, case text converters, and content clean utilities.
Marketing & SEO
Optimize meta tags, analyze keyword densities, and generate redirects.
Health & Fitness
BMI calculators, caloric targets, macro splitters, and target heart rates.
Legal & Employment
Calculate payroll timelines, severance, overtime, and contract terms.
Education & Academics
GPA calculators, final grade planners, weighted grade solvers, and citation formatters.
Image & PDF Tools
Client-side image resizers, compressors, and PDF mergers. Fully private, no server uploads.
AI Tools
Token calculators, API pricing models, prompt formatters, and AI utility tools for LLM developers and creators.
Startup & SaaS
MRR/ARR calculators, burn rate estimators, SaaS valuation tools, and subscription metrics.