Web Tools & Utilities
fast & client-side.
Free browser-based developer & electronics tools. 100% local, no data leaves your browser.
3D Viewer
Supported file types: STL, STEP, STP, OBJ, 3MF, GLTF, GLB, PLY, FBX, DAE, IGES.
Zip Archive Builder
Create Zip files directly in your browser. Upload files and download the archive. No data leaves your computer.
ASCII Flow Diagram Designer
Draw flowcharts, boxes, arrows, and text using plain text characters (ASCII) directly in your web browser.
ASCII Art Generator
Transform images into retro ASCII art.
ASCII / HEX Converter
Convert text to hexadecimal and back.
Aspect Ratio Calculator
Calculates width or height based on an aspect ratio.
Audio Recorder & Frequency Meter
Microphone recording with live spectrum analyzer, VU peak meter, pause/resume, and export to WAV, MP3, or WebM.
Audio Trimmer
Trim audio files easily in your browser. Visualize the waveform and export the selection as WAV or MP3.
Base64 Encoder / Decoder
Encode and decode text or data to Base64.
Battery & EV Charge Time Calculator
Calculate charge time, finish time, and costs for EVs and batteries - with charge curve and live tracking.
Calendar Week Calculator
Show current calendar week (CW) and convert date to calendar week.
Capacitor Charge Time Calculator
Calculate the RC time constant and charge/discharge curve of a capacitor through a resistor, including voltage over time, time to reach a target level, and a visual curve.
Case Converter
Convert text between Uppercase, Lowercase, CamelCase, and more.
Certificate Checker
Analyze and extract signatures and certificates from executable files (.exe, .efi) or certificate files.
Chmod Calculator
Easily calculate Linux file permissions (chmod) in numeric and symbolic formats.
Color Detector & Camera Eyedropper
Real-time color detection via camera or image: Pixel-exact sampling and area average.
Color Picker & Converter
Pick colors and convert between Hex, RGB, HSL, and CMYK.
Controller Tester
Supports PlayStation (PS5, PS4), Xbox (Series, One, 360), Nintendo Switch, and generic USB/Bluetooth gamepads.
BIN HEX DEC OCT Converter
Convert numbers between binary, hexadecimal, decimal, and octal, and toggle individual bits.
Cron-Job Visualizer
Create Cron jobs interactively and visualize execution times on a calendar and timeline.
CSS Formatter / Beautifier
Format CSS code for better readability or minify it for production.
CSV Viewer & Converter
Open CSV files online, search through them, and convert them to JSON or XML.
Date Calculator
Calculate the duration between two dates or add/subtract days from a date.
Device Info
Displays detailed information about your current device, browser, screen, and more.
Diff & Patch Generator
Compare two texts line-by-line, visualize differences, and download the output as a patch file.
DNS-over-HTTPS Lookup
Find the IP address behind a domain and query DNS records (A, AAAA, MX, TXT) securely over HTTPS.
EDID Viewer
Decode and analyze 128 byte EDID binary data to view supported timings, texts, and settings.
Exif Data Viewer
Read metadata such as camera model, exposure settings, timestamp, and GPS coordinates from your photos.
Favicon Generator
Generate a complete favicon package (ICO, PNG sizes, Apple touch icon, web manifest) from an image, text, or emoji, including ready-to-use HTML code, as a ZIP download.
File Analyzer
Analyze files: View MIME types, file size, modification date, and hex headers.
All-In-One File Converter
Universal local converter for images, audio, video, binaries, 3D/CAD, documents, and data.
Flexbox Playground
Interactive guide to CSS Flexbox properties.
Font Glyph Inspector
Inspect font files (TTF, WOFF, WOFF2) to view contained characters (glyphs), unicode ranges, and metadata.
Hash & File Checksum
Generate hashes from text or calculate file checksums (MD5, SHA256...) directly in your browser.
HEIC Converter
Convert HEIC/HEIF images easily to JPG or PNG directly in your browser.
Hex File Editor & Analyzer
Hex and binary editor. View data in HEX, DEC, BIN, or OCT, navigate with customizable page sizes (up to 16 KB) and row widths, inspect values with the data inspector, and edit bytes.
HTML Encoder / Decoder
Convert special characters to HTML entities and back. Important for web development and security.
I²C Pull-up & UART Baud Rate Calculator
Calculate I²C pull-up resistors from bus capacitance and speed, or find the UART baud rate error for a given MCU clock frequency (ESP32, Arduino, STM32).
ICS Calendar Viewer & Creator
Open, inspect, and create .ics / iCalendar files directly in your browser.
Image Batch Processor
Resize, crop, and convert multiple images at once.
Image Compressor
Compress and resize images (JPEG, PNG, WebP) while maintaining visual quality.
JSON Formatter / Minifier
Format or minify JSON data.
JWT Decoder
Decode JSON Web Tokens (JWT) to view header, payload, and signature.
Keycode Info
Shows information about pressed keys.
Log File RegExp Filter
Upload local log files and filter them in real-time using regular expressions or keywords in a color-coded terminal console.
Lorem Ipsum Generator
Generate placeholder text for your designs.
Markdown Editor
Write Markdown and see the preview instantly.
Meta Tag Generator
Generate HTML SEO meta tags for your website.
Metronome
A precise metronome with different time signatures and visual display.
MIDI Viewer
Read MIDI signals from your connected input device/keyboard in real-time.
Morse Code Audio Translator
Translate text to Morse code, play the audio signals, and visualize them with a flashing signal lamp.
Local OCR
Extract text from images directly in your browser. Your data never leaves your computer. Supports multiple languages.
Image to Palette Extractor
Extract a color palette from any image.
Password Generator
Generate strong, secure random passwords directly in your browser.
PDF Tools (Merge, Split & Rotate)
Merge multiple PDFs, reorder, rotate, or delete individual pages, and export custom page ranges.
Percentage Calculator
Calculates percentage value, rate, percentage change, discount with cash discount, VAT, and tip splitting.
Pixel Art Maker
Create simple 16x16 pixel art and export it as PNG, SVG, or CSS.
Pomodoro Timer
A simple Pomodoro timer for productivity and regular breaks.
QR Code Generator
Quickly create QR codes for text or links, directly in your browser.
Random File Generator
Generate test files with random data in customizable sizes (up to 2 GB).
Random Generator
Well, the name pretty much says it all, right?
Regex Tester
Test your regular expressions (Regex) in real-time. Supports match highlighting.
Resistor Calculator (Color Code & SMD)
Calculate resistance values interactively from 4, 5, and 6 band color codes, convert values back to color codes, or decode SMD markings (3-digit, 4-digit & EIA-96).
Fixed Sample Files
Download deterministic sample files of fixed sizes (1KB to 1GB).
Screen Recorder
Record your screen, windows, or browser tabs. No download required.
Screenshot Tool
Take screenshots of windows, screens, or browser tabs directly online.
Search & Replace
Search and replace text online. Supports regular expressions (regex) and case sensitivity.
Serial Terminal
Free web-based Serial Terminal and serial monitor directly in your browser. Connect via Web Serial API to any COM port, USB-UART adapter, or serial interface, send commands, and analyze data in real time without installation.
Signal Generator
Generate various test tones and frequencies (Sine, Square, Noise).
Digital Signature Generator
Creates digital signatures via freehand drawing, typed text, or photo scan as transparent PNG or SVG.
Pixel-Art Sprite Animator
Load a pixel art sprite sheet, slice it into frames, and animate it in a customizable loop.
Sprite Sheet Slicer
Slice sprite sheets automatically into individual images. Define rows, columns, or fixed sizes and download everything as a ZIP.
Stopwatch
Precise stopwatch with lap times.
Binary Strings Extractor
Extract printable ASCII and Unicode (UTF-16LE) strings from binary files (.exe, .dll, .bin, firmware).
Subnet & CIDR Calculator
Calculate network boundaries, IP address ranges, netmasks, and usable hosts for IPv4.
Syntax Highlighter
Auto-detect and highlight code syntax. Export as SVG or Word.
Synthesizer
Modular software synthesizer with oscillators, filter, ADSR faders, LFO, effects, MIDI, and keyboard.
Text Diff Checker
Compare two text contents and see what changed between them.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
Timezone Planner
Find ideal meeting times and plan global appointments by overlapping multiple timezones.
URL Encoder / Decoder
Safely encode and decode URL parameters.
URL Parser
Parse URLs into their components: Protocol, Host, Path, Query Parameters, and more.
UUID Generator
Generate secure random UUIDs (Version 4). Bulk generation supported.
Video Editor
Trim and sequence video clips, insert images, add music and mix audio. Export as MP4 or WebM.
Video Player
Play video files or URLs. Features: Volume boost, playback speed, screenshot and more.
Video-to-GIF Converter
Convert short videos (MP4, WebM) client-side directly in the browser into animated GIFs with customizable FPS and resolution.
Voltage Divider Calculator
Calculate output voltage, quiescent current, and power dissipation of voltage dividers or automatically find the best E12/E24/E96 resistor pairs for your target voltage.
Webcam Recorder
Online camera tool: Take photos and record videos directly via your webcam.
WiFi QR Code Generator
Create QR codes to easily connect guests to your WiFi network.
Word Counter
Free online word counter and character counter. Count words, characters, sentences, and paragraphs in real-time.