Free all multi tool

30 Useful Coding Tools for Developers

1. File Converter (Python)

import os
from PIL import Image

def convert_image(input_path, output_format):
    img = Image.open(input_path)
    output_path = os.path.splitext(input_path)[0] + f'.{output_format}'
    img.save(output_path)
    print(f"Converted to {output_format} successfully!")

2. Password Generator (Python)

import random
import string

def generate_password(length=12):
    chars = string.ascii_letters + string.digits + string.punctuation
    return ''.join(random.choice(chars) for _ in range(length))

3. URL Shortener (JavaScript)

const urlDatabase = {};

function shortenURL(longURL) {
    const shortCode = Math.random().toString(36).substring(2, 8);
    urlDatabase[shortCode] = longURL;
    return `short.url/${shortCode}`;
}

4. QR Code Generator (Python)

import qrcode

def generate_qr(data, filename="qrcode.png"):
    img = qrcode.make(data)
    img.save(filename)
    print(f"QR code saved as {filename}")

5. Currency Converter (Python)

import requests

def convert_currency(amount, from_curr, to_curr):
    url = f"https://api.exchangerate-api.com/v4/latest/{from_curr}"
    response = requests.get(url).json()
    rate = response['rates'][to_curr]
    return amount * rate

6. Text to Speech (Python)

from gtts import gTTS
import os

def text_to_speech(text, lang='en'):
    tts = gTTS(text=text, lang=lang)
    tts.save("output.mp3")
    os.system("start output.mp3")

7. File Encryption (Python)

from cryptography.fernet import Fernet

def encrypt_file(filename, key):
    fernet = Fernet(key)
    with open(filename, 'rb') as file:
        original = file.read()
    encrypted = fernet.encrypt(original)
    with open(filename + ".enc", 'wb') as encrypted_file:
        encrypted_file.write(encrypted)

8. Web Scraper (Python)

import requests
from bs4 import BeautifulSoup

def scrape_website(url):
    page = requests.get(url)
    soup = BeautifulSoup(page.content, 'html.parser')
    return soup.get_text()

9. Temperature Converter (JavaScript)

function celsiusToFahrenheit(celsius) {
    return (celsius * 9/5) + 32;
}

function fahrenheitToCelsius(fahrenheit) {
    return (fahrenheit - 32) * 5/9;
}

10. Markdown to HTML Converter (Python)

import markdown

def md_to_html(md_text):
    return markdown.markdown(md_text)

11. Image Resizer (Python)

from PIL import Image

def resize_image(input_path, output_path, size):
    with Image.open(input_path) as img:
        img.thumbnail(size)
        img.save(output_path)

12. JSON Validator (JavaScript)

function isValidJSON(jsonString) {
    try {
        JSON.parse(jsonString);
        return true;
    } catch (e) {
        return false;
    }
}

13. CSV to JSON Converter (Python)

import csv
import json

def csv_to_json(csv_file, json_file):
    data = []
    with open(csv_file) as csvf:
        csv_reader = csv.DictReader(csvf)
        for row in csv_reader:
            data.append(row)
    with open(json_file, 'w') as jsonf:
        jsonf.write(json.dumps(data, indent=4))

14. Random Quote Generator (JavaScript)

const quotes = [
    "The only way to do great work is to love what you do. - Steve Jobs",
    "Innovation distinguishes between a leader and a follower. - Steve Jobs",
    "Stay hungry, stay foolish. - Steve Jobs"
];

function getRandomQuote() {
    return quotes[Math.floor(Math.random() * quotes.length)];
}

15. BMI Calculator (Python)

def calculate_bmi(weight, height):
    bmi = weight / (height ** 2)
    if bmi < 18.5:
        category = "Underweight"
    elif 18.5 <= bmi < 25:
        category = "Normal weight"
    elif 25 <= bmi < 30:
        category = "Overweight"
    else:
        category = "Obese"
    return bmi, category

16. Age Calculator (JavaScript)

function calculateAge(birthDate) {
    const today = new Date();
    const birth = new Date(birthDate);
    let age = today.getFullYear() - birth.getFullYear();
    const monthDiff = today.getMonth() - birth.getMonth();
    
    if (monthDiff < 0 || (monthDiff === 0 && today.getDate() < birth.getDate())) {
        age--;
    }
    return age;
}

17. File Search Tool (Python)

import os

def search_files(directory, extension):
    matches = []
    for root, dirs, files in os.walk(directory):
        for file in files:
            if file.endswith(extension):
                matches.append(os.path.join(root, file))
    return matches

18. Palindrome Checker (JavaScript)

function isPalindrome(str) {
    const cleaned = str.toLowerCase().replace(/[^a-z0-9]/g, '');
    return cleaned === cleaned.split('').reverse().join('');
}

19. Email Validator (Python)

import re

def is_valid_email(email):
    pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
    return re.match(pattern, email) is not None

20. Word Counter (Python)

def count_words(text):
    words = text.split()
    return len(words)

21. Time Zone Converter (Python)

from datetime import datetime
import pytz

def convert_timezone(dt, from_tz, to_tz):
    from_zone = pytz.timezone(from_tz)
    to_zone = pytz.timezone(to_tz)
    dt = from_zone.localize(dt)
    return dt.astimezone(to_zone)

22. IP Address Lookup (Python)

import socket

def get_ip_info(domain):
    try:
        ip = socket.gethostbyname(domain)
        return {"domain": domain, "ip": ip}
    except socket.gaierror:
        return None

23. File Checksum Generator (Python)

import hashlib

def get_file_checksum(filename, algorithm='sha256'):
    h = hashlib.new(algorithm)
    with open(filename, 'rb') as file:
        while chunk := file.read(4096):
            h.update(chunk)
    return h.hexdigest()

24. Base64 Encoder/Decoder (JavaScript)

function encodeBase64(text) {
    return btoa(text);
}

function decodeBase64(encoded) {
    return atob(encoded);
}

25. Directory Size Calculator (Python)

import os

def get_directory_size(directory):
    total = 0
    for entry in os.scandir(directory):
        if entry.is_file():
            total += entry.stat().st_size
        elif entry.is_dir():
            total += get_directory_size(entry.path)
    return total

26. Roman Numeral Converter (Python)

def int_to_roman(num):
    val = [
        1000, 900, 500, 400,
        100, 90, 50, 40,
        10, 9, 5, 4,
        1
    ]
    syb = [
        "M", "CM", "D", "CD",
        "C", "XC", "L", "XL",
        "X", "IX", "V", "IV",
        "I"
    ]
    roman_num = ''
    i = 0
    while num > 0:
        for _ in range(num // val[i]):
            roman_num += syb[i]
            num -= val[i]
        i += 1
    return roman_num

27. Color Code Converter (JavaScript)

function rgbToHex(r, g, b) {
    return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
}

function hexToRgb(hex) {
    const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
    } : null;
}

28. PDF Merger (Python)

from PyPDF2 import PdfMerger

def merge_pdfs(pdf_list, output):
    merger = PdfMerger()
    for pdf in pdf_list:
        merger.append(pdf)
    merger.write(output)
    merger.close()

29. HTTP Server (Python)

from http.server import SimpleHTTPRequestHandler, HTTPServer

def run_server(port=8000):
    server_address = ('', port)
    httpd = HTTPServer(server_address, SimpleHTTPRequestHandler)
    print(f"Serving on port {port}...")
    httpd.serve_forever()

30. Video to Audio Converter (Python)

from moviepy.editor import VideoFileClip

def extract_audio(video_path, audio_path):
    video = VideoFileClip(video_path)
    audio = video.audio
    audio.write_audiofile(audio_path)
    audio.close()
    video.close()

Pro Tip: For better SEO, consider adding a description before each tool explaining its purpose and use cases. Also, add relevant keywords naturally throughout your post.