THE TOOLBOX

Tools

Find a tool for your next task. Free to use, with no account.

43 tools ready to use.

Everyday8

QR Studio

Encode a website URL, Wi-Fi network or contact and export a scannable QR code.

Color Studio

Convert HEX, RGB and HSL colors, build palettes and measure contrast.

Markdown Studio

Write Markdown with a live sanitized preview, tables and HTML or PDF export.

Password Studio

Generate secure passwords and EFF word-list passphrases using Web Crypto.

Date Studio

Calculate calendar-day differences, countdowns and Unix timestamps.

Text Studio

Count words and characters, change case, trim lines and remove duplicates.

Unit Studio

Convert over 130 units across 19 categories, including energy, storage and temperature.

Random Studio

Draw random numbers without repeats or split participants into groups using Web Crypto.

Developer19

Diagram Studio

Create flowcharts, UML class, sequence and ER diagrams with a local Mermaid editor and SVG/PNG export.

Data Pipeline Studio

Combine Base64, URL, JSON, text and hash operations into reusable local recipes.

Cron Studio

Build five-field cron schedules, explain their rules and preview executions in a selected time zone.

Database Studio

Inspect PostgreSQL CREATE TABLE and foreign-key constraints and turn a schema into an ER diagram.

Network Topology Builder

Draw devices and links, annotate IPs, subnets and VLANs, and export network documentation.

System Architecture Studio

Map servers, databases, proxies, containers and service dependencies with an interactive editor.

JSON Studio

Validate, format, minify and sort JSON documents in your browser.

URL Studio

Encode, decode and inspect URLs, query parameters and components.

Number Studio

Convert exact integers between bases 2 and 36 with BigInt.

JWT Studio

Decode JWT headers, payloads and expiration dates locally. This does not verify a signature.

Base64 Studio

Encode or decode UTF-8 text and files with standard Base64 or Base64URL.

Regex Studio

Test JavaScript regular expressions with highlighted matches, captures and replacement.

Diff Studio

Compare text or files with line and character differences.

Network Studio

Calculate IPv4 and IPv6 subnets, host ranges, binary representations and IPv4 VLSM plans.

Hash Studio

Calculate SHA-256, SHA-384 and SHA-512 digests of local text or files using Web Crypto.

CSV Studio

Parse, edit and convert quoted or multiline CSV and JSON tables.

SQL Studio

Format and highlight SQL for several dialects without executing queries.

API Studio

Send HTTP requests directly from your browser and inspect responses, headers and timing.

UUID Studio

Generate UUID v4 and random hexadecimal identifiers with Web Crypto.

Math & study8

Grade Calculator

Calculate a credit-weighted university grade average and its base out of 110.

Graduation Calculator

Estimate a final graduation grade from your average, thesis points and bonuses.

Statistics Studio

Calculate descriptive statistics, normal distribution probabilities and binomial probabilities.

Matrix Studio

Add, multiply, transpose and invert matrices or solve linear systems up to 10 by 10.

Equation Solver

Solve linear and quadratic equations with real coefficients and real or complex roots.

Graph Studio

Plot mathematical functions with a local expression parser and configurable axes.

LaTeX Studio

Preview mathematical LaTeX locally and export formulas as SVG or PNG.

Study Timer

Run focus and break sessions with completed-session statistics saved in your browser.

Images & files4

Image Studio

Resize, convert and compress PNG, JPEG and WebP images without uploading them.

PDF Studio

Merge, split, rotate, reorder and extract PDF pages, or assemble images into a PDF locally.

Metadata Studio

Inspect image properties and available EXIF, camera, date or GPS metadata, then export a clean copy.

Interactive labs4

Pathfinding Lab

Explore Dijkstra, A*, BFS and DFS on an editable grid with walls and weighted terrain.

Sorting Lab

Animate and compare Bubble, Insertion, Merge and Quick Sort with comparisons, writes and complexity notes.

Cellular Automata

Experiment with Conway’s Game of Life and elementary cellular rules such as Rule 30 and Rule 110.

Physics Lab

Explore a pendulum and gravity-driven circle collisions with adjustable parameters and fixed-step simulation.

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