Free online tools

18+ tools for developers and creators. Every tool runs in your browser — no upload, no signup, no telemetry.

Developer tools

4 tools

Format, encode, and inspect data the way developers actually do.

JSON Formatter & Validator

Beautify, minify, and validate JSON instantly in your browser. 100% client-side, no upload.

Hash Generator

Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser. No upload.

JWT Decoder

Decode JSON Web Tokens in your browser — inspect header, payload, and signature without a server round-trip.

Cron Expression Generator & Parser

Build, parse, and validate cron schedule expressions with human-readable natural language translation, visual field picker, and upcoming execution timeline.

Encoders & decoders

2 tools

Move data between encodings — Base64, URL, percent — without leaving the browser.

Base64 Encoder & Decoder

Encode and decode Base64 strings with UTF-8 safety, URL-safe mode, and MIME/PEM line formatting. 100% client-side.

URL Encode / Decode

Percent-encode and decode URLs and components. Handles UTF-8, query strings, full URLs.

Generators

2 tools

Spin up passwords, UUIDs, and other identifiers with cryptographic randomness.

UUID Generator

Generate RFC 4122 v4 UUIDs in bulk using the browser crypto API. No server, no duplicates.

Password Generator

Generate strong, random passwords with custom length and character sets. Client-side only.

Image tools

4 tools

Create and tweak images for web, print, and mobile.

QR Code Generator & Vector Styler

Generate standards-compliant ISO/IEC 18004 QR codes for URLs, Wi-Fi, vCard contacts, and text. Download vector SVG & 2X HD PNG.

Image Compressor & WebP Converter

Compress and convert JPEG, PNG, and WebP images client-side. Live byte-savings preview, custom quality, and zero server upload.

Color Picker & Palette Studio

Convert colors across HEX, RGB, HSL, HSV, OKLCH, and CMYK with live WCAG 2.1/2.2 contrast ratio analysis, tonal scales, and color harmonies.

SVG to PNG Converter

Convert SVG vector graphics to high-resolution PNG images instantly in your browser. Customizable dimensions, Retina/4K scaling, and background color.

Text tools

3 tools

Manipulate text — case, count, placeholder, transform.

Lorem Ipsum Dummy Text Generator

Generate customizable placeholder text by paragraph, sentence, or word count. Supports classic Latin (Cicero 45 BC), modern English, tech jargon, and HTML tags.

Case Converter

Instantly convert strings across 12 standard programming cases: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and more with one-click copy and live matrix preview.

Word & Character Counter

Calculate word count, character count (with/without spaces), sentence density, paragraph volume, reading/speaking times, and live SEO & social limits.

Converters

3 tools

Convert between units, formats, and markup — length, mass, temperature, Markdown, and more.

Unit Converter

High-precision multi-category unit converter supporting Length, Mass, Temperature, Volume, Time, and Digital Storage compliant with BIPM SI and IEC standards.

Markdown to HTML Converter

Convert Markdown to clean, sanitized HTML with live dual-pane preview, GFM tables, task lists, reading time metrics, and one-click .html export.

Unix Timestamp & Epoch Converter

Convert between Unix timestamps and human-readable dates with real-time ticking clock, global multi-timezone matrix, millisecond/microsecond auto-detection, and Year 2038 health audit.