All Tools.
One Place.
Converters, generators, analysis tools – many running directly in your browser, no account or upload required.
Privacy
Browser tools process everything locally – no data leaves your browser.
Instant & free
No account needed for browser tools. Just open and go.
Server Tools
Powerful workers for video and audio processing – available after signing in.
🎵 Media & Image
Audio Converter
Conversion runs directly in the browser – no data is uploaded
Video to Audio
Extract audio from video files – no server upload
Audio Trimmer
Trim audio files – freely choose start & end, directly in the browser
Image Converter
PNG · JPEG · WebP · AVIF · BMP · GIF – convert directly in the browser
Image Upscaler
Upscale images with AI-like interpolation – in the browser
Background Remover
Remove background from images – directly in the browser
Color Palette Extractor
Extract dominant colors from an image
EXIF Viewer
Read image metadata (EXIF, GPS, camera info)
Favicon Generator
Convert PNG/SVG to .ico, 16×16, 32×32 and Apple Touch Icons
Image Compressor
Compress images losslessly or with quality level – in the browser
SVG Optimizer
Compress SVG files and remove unnecessary attributes – in the browser
Image Crop & Resize
Scale, crop and process images via canvas – in the browser
Waveform Viewer
Visualize audio file as waveform – in the browser
Screen Recorder
Record screen, window or browser tab locally as video
Color Picker & Harmonies
HEX · RGB · HSL · CMYK + complementary colors
GIF Frame Extractor
Split animated GIF into individual PNG frames – in the browser
EXIF Metadata Remover
Re-render image through canvas → all metadata (GPS, camera, etc.) removed
Pixel Art Editor
Draw and export pixel art directly in the browser
Sprite Sheet Generator
Merge multiple images into a sprite sheet
Color Gradient Palette
Generate intermediate colors between 2 colors
Images to PDF
Merge multiple images into a PDF file
PDF Splitter
Split PDFs by page ranges and export as PDF/ZIP
PDF Merger
Merge multiple PDF files into one PDF in the desired order
Video Thumbnail Extractor
Extract still frames from videos – directly in the browser
Barcode Generator
EAN-13, QR, Code 128, DataMatrix & more – generate directly in the browser
Base64 Image Encoder
Encode and decode images as Base64 data URLs – in the browser, no upload
STL Slicer
Automatically split 3D objects into printable segments with connectors.
Simple CAD
Interactive 3D construction tool: place basic shapes, combine them, export as STL.
3D Viewer
View 3D models: rotate and inspect STL, OBJ, PLY, GLTF, GLB and 3MF in the browser.
📝 Text & Documents
Word & Character Counter
Count words, characters, sentences and paragraphs in text
Lorem Ipsum Generator
Generate placeholder text in various formats
Line Sorter
Sort, reverse, deduplicate lines – no upload
IBAN Validator
Validate, format and inspect IBANs – offline in the browser
Case Converter
Convert text to different case styles – in the browser
CSV to SQL Converter
Convert CSV files to SQL INSERT statements
Markdown to HTML
Convert Markdown to formatted HTML – in the browser
ASCII Art Generator
Convert text to ASCII art fonts – directly in the browser
ASCII Table
All 128 ASCII characters with decimal, hex, binary values and names – searchable
Text Diff Merger
Compare two texts and merge differences
JSON ↔ YAML ↔ TOML
Convert between JSON, YAML and TOML
Regex Replacer
Test regular expressions and replace text – in the browser
HTML Entity Encoder
Encode and decode HTML special characters
Markdown Table Generator
Table editor with Markdown export
Text to Speech
Have text read aloud using the Web Speech API
Speech to Text
Convert speech input to text using the Web Speech API
CSV Viewer & Editor
Load CSV, display as table, sort, search and edit
Roman Numerals
Convert Arabic numbers to Roman numerals and vice versa
Classic Ciphers
ROT13, Caesar, Vigenère, Atbash & Morse code – in the browser
Unicode Inspector
Analyze characters, code points, UTF-8/16/32 and Unicode blocks
.gitignore Generator
Select your stack → generate .gitignore
HTTP Status Codes
All HTTP status codes with description and category
⚙️ Developer Tools
JSON Formatter & Validator
Format, validate and minify JSON – runs in the browser
JSON Diff
Compare two JSON structures – highlight differences with color
Diff Checker
Compare two texts line by line – runs in the browser
JWT Decoder
Decode and validate JSON Web Tokens
Base64 & URL Encoder
Encode/decode Base64 and URL parameters – runs in the browser
YAML ↔ JSON Converter
Convert between YAML and JSON – in the browser
XML → JSON
Convert XML to JSON – DOMParser in the browser, no upload
IEEE-754 Float Visualizer
Interactively analyze Float32/Float64 bits, sign, exponent and mantissa
HTML/CSS/JS Minifier & Beautifier
Minify or format HTML, CSS, JS and JSON – runs in the browser
Regex Tester
Interactively test and debug regular expressions
Docker Compose Generator
Generate docker-compose.yml for common services
Timestamp Converter
Convert Unix timestamps to date/time and vice versa
UUID Generator
Generate UUID v1, v4, v5 and ULID – directly in the browser
JSON to TypeScript
Convert JSON to TypeScript interfaces – in the browser
URL Parser & Builder
Decompose, analyze and reassemble URL components
Number Base Converter
Convert between binary, octal, decimal and hexadecimal
Hex / Binary Inspector
Display hex or binary value as integer (8–128 bit), float and string – incl. Big & Little Endian
CSS Gradient Generator
Visually create gradients and export as CSS
SQL Formatter
Format and indent SQL queries – in the browser
Color Contrast Checker
Calculate WCAG 2.1 AA/AAA contrast ratio
Unit Converter
Convert length, weight, temperature, area, volume and more
CSS Box-Shadow Generator
Visual builder with live preview
CSS Border-Radius Generator
Visual editor with live preview
CSS Unit Converter
px ↔ rem ↔ em ↔ pt ↔ vw/vh
JSONPath Tester
Test JSONPath expressions against JSON data
SemVer Bumper
Bump and compare semantic version numbers
PEM Decoder
Decode and analyze PEM certificates and keys
HTTP Header Visualizer
Fetch and visualize HTTP response headers of a URL
CORS Tester
Send HTTP requests and display all response headers
File Transfer Duration Calculator
Calculate the expected transfer duration for files at a given bandwidth
Logic Gate Simulator
Simulate digital circuits with AND, OR, NAND, XOR, flip-flops, MUX/DEMUX using drag-and-drop
🔒 Security & Cryptography
Password Generator
Generate secure passwords with configurable character set
Hash Generator
MD5, SHA-1/256/384/512 from text or file – runs in the browser
AES-256 Encryption
Encrypt and decrypt text with AES-256-GCM + PBKDF2 in the browser
Password Strength Checker
Analyze the strength and security of a password
RSA Key Generator
Generate RSA-2048/4096 key pairs in the browser
TOTP Generator
Generate time-based one-time passwords (RFC 6238) in the browser
HMAC Signer
Compute HMAC-SHA-1/256/512 with WebCrypto
CRC Calculator
CRC-8, CRC-16, CRC-32 from text or hex bytes
Bcrypt Generator
Hash and verify passwords with bcrypt
JWT Generator
Create and sign JSON Web Tokens with HS256/RS256
Encrypted File Transfer
Share files E2E-encrypted (ECDH + AES-GCM) via WebRTC P2P – no server upload
🌐 Network & Infrastructure
Subnet Calculator (CIDR)
Calculate IPv4 subnet mask, network address, broadcast and host range
VLSM Subnetting
Automatic subnet plan with variable masks (VLSM), naming and print function
Cron Expression Generator
Visually create and validate cron expressions
Uptime & Website Monitor
Monitor website availability and measure response times
QR Code Generator
Generate QR codes for text, URLs, WiFi and more
DNS Lookup
A · AAAA · MX · TXT · NS · CNAME · SOA · CAA via Cloudflare DoH
DNS Multi-Resolver
Query DNS records from 6 public resolvers and check consistency – Guest: 1 request/minute
IP Geolocation
Look up location, ISP and metadata of an IP address
IP Lookup (ASN)
Resolve IPv4 address to ASN, country and IP range
My IP
Show your currently visible IP address and proxy headers
SSL Certificate Checker
Check SSL/TLS certificate details, expiry date and chain
SSL Certificate Analyzer
Show full SSL certificate chain, key details, SANs and fingerprints
HTTP Request Tester
Send HTTP requests directly in the browser and analyze the response
MAC Vendor Lookup
IEEE OUI: Identify manufacturer from MAC address
🔌 Hardware & Maker
Resistor Color Code Calculator
Decode 4- and 5-band color codes and calculate resistance value
Byte Converter
Convert between Bit, Byte, KB, KiB, MB, MiB, GB, GiB ...
LED Resistor Calculator
Calculate LED series resistor – ohms & power dissipation
Baud Rate Calculator
Divider, actual baud rate & error for microcontrollers
Voltage Divider Calculator
Calculate output voltage or resistor values for voltage dividers
NE555 Calculator
Calculate frequency, duty cycle and resistors for NE555 circuits
Capacitor Code Calculator
3-digit SMD/ceramic code ↔ capacitance (pF/nF/µF)
I²C Addresses
7-bit I²C addresses of common components and write address calculation
Raspberry Pi Pinout
BCM/WiringPi/Board numbering for all 40-pin GPIO models
Arduino Uno Pinout
ATmega328P · 14 Digital · 6 Analog · 6 PWM · UART / SPI / I²C
Arduino Nano Pinout
ATmega328P · 22 Digital (incl. A0–A5) · 8 Analog · 6 PWM · A6/A7 analog only
Teensy 4.1 Pinout
ARM Cortex-M7 · 600 MHz · 55 Digital · 18 Analog · CAN · USB Host
Raspberry Pi Pico Pinout
RP2040 · Dual-Core ARM Cortex-M0+ · 133 MHz · 3.3V · 26 Multi-Func GPIO
ESP32 DevKit v1 Pinout
Xtensa LX6 Dual-Core · 240 MHz · 3.3V I/O · 34 GPIO · ADC/DAC/Touch · WiFi + Bluetooth
ESP8266 NodeMCU v3 Pinout
Tensilica L106 · 80/160 MHz · 3.3V I/O · 11 usable GPIO · 1x ADC · WiFi 802.11 b/g/n
Modbus Parser
Create Modbus RTU frames, check CRC-16 and decode request/response fields
MQTT Explorer
Connect to MQTT broker via WebSocket, subscribe to topics and send messages
BACnet Explorer
Explore BACnet/IP devices and objects on the local network – requires socket-bridge
Gamepad Tester
Test controller buttons, triggers and axes in real time
Solar System Simulator
Annual simulation: generation, storage, grid feed-in and self-sufficiency calculation
🔢 Mathematics & Finance
Percentage Calculator
Calculate percentages, percentage rates and changes
Compound Interest Calculator
Final capital, annual breakdown, optional deposits
Loan Calculator
Calculate monthly payment, total interest and amortization schedule for annuity loans
Date Difference & Age Calculator
Calculate the difference between 2 dates or exact age
Rule of Three Calculator
Calculate direct and inverse rule of three