Online Developer Tools & Free Web Utilities

Generate random passwords, UUIDs, colors, QR codes, slugs, and more. Essential tools for developers and everyday use.

Minify JavaScript, HTML, CSS, and JSON to reduce file size and improve load times. Keep your code compact and fast.

Format and beautify code in multiple languages. Support for JavaScript, HTML, CSS, JSON, SQL, XML, and more.

Convert between formats: JSON to CSV, YAML to JSON, base64 to image, and many more data transformations.

Create cryptographic hashes: MD5, SHA-1, SHA-256, SHA-512, SHA-3, and RIPEMD-160 for security and integrity.

Encode and decode URL, Base64, Base32, Base58, Base62, HTML entities, and QR codes.

View and inspect content: diff viewer, image color picker, source code viewer, and more.

Parse and analyze URLs, cURL commands, user agents, and color values.

Validate CSS, JSON, CSV, and other formats. Ensure your data is correct before use.

Encrypt and decrypt data using AES, Rabbit, and TripleDES algorithms. Client-side security.

Online URL utilities: follow redirects, URL shortening, and URL-related operations.

YouTube and TikTok utilities, FFmpeg browser tools for audio extraction, trimming, GIF conversion, and compression. For creators and developers.

Token counters, JSON extractors, and utilities for working with AI prompts and LLM outputs. Estimate token usage and parse responses.

Generate CSS for gradients, box shadows, flexbox, backgrounds, and more. Visual editors with live preview. Copy-ready code.

Online calculators: expressions, BMI, mortgage and loan payments, tip splitter, GPA and final-grade, interest, statistics, GCD/LCM, primes, bases, and more. All run in your browser.

Convert length, weight, temperature, volume, area, speed, data storage, time, pressure, energy, angle, power, frequency, fuel consumption, density, torque, force, flow rate, acceleration, illuminance, and electric units. Meters, kg, Celsius, mph, GB and more. Free online. Client-side.

Meta tag generator, JSON-LD schema, Open Graph, sitemap, robots.txt. SEO helpers for developers and content creators.

SVG minifier, optimizer, and data URI converter. All run in your browser. No server required.

Key code viewer, shortcut formatter. Capture key events and format keyboard shortcuts. Client-side.

Generate test tones, white noise, retro sound effects, and a metronome in your browser. Web Audio API — no uploads.

View your IP, user agent, screen size, and browser info. Useful for debugging and testing.

Visualize sorting algorithms with animations. Bubble sort, quick sort, merge sort, and more. Learn how algorithms work step by step.

Postal code lookup, validation, and address tools. Find city and state from postal code. Supports 70+ countries.

Free online PDF tools that run entirely in your browser. Merge, split, compress, convert, rotate and edit PDFs. 100% client-side — your files never leave your device.

Free online Excel tools that run entirely in your browser. Convert, view, merge and transform spreadsheets. 100% client-side — your files never leave your device.

Convert Windows paths, line endings (CRLF/LF), sanitize filenames, format .reg files, and brace GUIDs for the registry. All run in your browser — no upload, no server.

chmod octal and symbolic permissions, Unix paths and WSL, sanitize POSIX filenames, format .desktop files, escape bash strings. All run in your browser — no upload, no server.

Format plist XML, convert file URLs to paths, sanitize Finder-friendly names, escape AppleScript strings, validate bundle IDs. All run in your browser — no upload, no server.

Create and extract ZIP archives in your browser. Pack multiple files or a whole folder, or unzip and download contents. 100% client-side — nothing is uploaded.

Free online text utilities: ROT/Caesar variants, line and word transforms, statistics, whitespace cleanup, classic ciphers, regex helpers, and more. Everything runs in your browser — your text never leaves your device.

Unix timestamps, UTC, ISO 8601, durations, countdowns, calendar helpers, and random date/time utilities. All run in your browser — nothing is uploaded.

Evaluate mathematical expressions: 2+3*4, sqrt(16), 2^10. Supports basic operations and common functions.

Compute Body Mass Index from height and weight (metric or imperial). Educational use only — not medical advice.

Estimate monthly mortgage payment from loan amount, annual interest rate, and loan term in years. Amortizing loan formula.

Calculate monthly payment and total interest for a fixed-rate loan (auto, personal) using principal, APR, and term in months.

Split the bill: enter subtotal, tip percentage, and number of people. Shows tip amount and per-person totals.

What do you need on the final? Enter your current grade, final exam weight, and target course grade.

Compute semester or cumulative GPA on a 4.0 scale from credit hours and letter grades (A–F with ±).

Merge multiple PDF files into one document in your browser. 100% client-side — your files never leave your device. No upload, no server.

Convert images (PNG, JPG, WebP) to PDF in your browser. Combine multiple images into one PDF. 100% client-side — files stay private.

Convert PDF pages to PNG or JPG images in your browser. 100% client-side — your files never leave your device. No upload required.

Create QR codes from text or URLs. Generate and download QR codes instantly.

Create simple APA or MLA citations for books and journal articles. Copy-ready bibliography lines. Runs in your browser.