Free online tools for electricians, shops & homes
61 free tools for shops, offices, homes, electricians and repair technicians — wire & MCB size, motor, capacitor, resistor code, solar, label crop, PDF tools, GST & EMI calculators, price tracker, UPI QR and more. No sign-up.
🔒 Files never leave your device ⚡ Works in your browser 🆓 Free · no login 📱 Phone & computer
Search tools
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1. Choose a tool Pick what you need above.
2. Add your PDF Tap to choose, or drag & drop the file.
3. Download The result is created on your device in seconds.
🔒 Private by design Your PDFs are processed in your browser. Nothing is uploaded to our server.
Questions
Are my files safe? Yes. Every tool runs inside your own browser — your PDFs and photos are never uploaded to any server, so customer addresses and invoices stay on your device.
Will barcodes still scan after cropping a label? Yes. Labels are cut out of the original PDF, not turned into a picture, so barcodes and QR codes stay perfectly sharp.
I don't have a thermal printer. Can I print on A4? Yes — in a label crop tool choose A4 sheet — 2 labels side by side . Cut along the light dashed lines.
The label box isn't exactly right. Drag the blue box, or its round corners, to exactly the area you want. The same area is used for every page. Any Label Crop works for any courier.
Is there a limit? Up to 100 MB per file and 1,000 pages. Very large files depend on your phone or computer's memory.
Does it cost anything? No — free, no sign-up, no watermark added to your files.
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Choose label PDF(s) or drag & drop here · you can select several files
Drag the blue box to adjust what's kept (it's detected automatically). The same area is used on every page.
Output size
4 × 6 inch (thermal printer) 4 × 4 inch A4 (label kept at its size) A4 sheet — 2 labels side by side (no thermal printer) Same as the cropped area
🎯 Detect label again
✂️ Crop all pages
Add two or more PDFs, put them in order with ↑ ↓, then merge.
📚
Choose PDFs or drag & drop · select several at once 🧩 Merge PDFs Clear list
Choose how strongly to compress. Basic keeps text sharp and selectable. Strong is best for scanned documents and photos — pages become images, so text can no longer be selected.
Compression
Basic — keep text (smaller change) Balanced — scans & photos (150 dpi) Strong — smallest file (100 dpi)
🗜️
Choose a PDF or drag & drop
Tip: pick a tool, then tap on the page where you want it. Drag to move; drag the round handle to resize. Double-tap text to type.
Get all the text from a PDF. Works for PDFs made on a computer; scanned photos of paper have no text layer to extract.
📝
Choose a PDF or drag & drop
📋 Copy text ⬇️ Download .txt
Extracted text
Take some pages out into a new PDF, or split the PDF into separate files.
✂️
Choose a PDF or drag & drop
Turn pages the right way up. Leave "Pages" empty to rotate every page.
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Choose a PDF or drag & drop
Add photos (JPG, PNG, WebP). Put them in order with ↑ ↓, then create one PDF. Phone photos are turned the right way up automatically.
Page size A4 Letter Same as the photo
Margin None Small Large
🖼️
Choose images or drag & drop · select several at once 📄 Create PDF Clear
Every page becomes a picture. Several pages are downloaded together as one ZIP file.
Format JPG (smaller) PNG (sharpest)
Quality Screen (100 dpi) Good (150 dpi) High (200 dpi)
🏞️
Choose a PDF or drag & drop
Choose the style and position, then add your PDF.
🔢
Choose a PDF or drag & drop
Type the watermark text, choose its look, then add your PDF. It is placed in the middle of every page.
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Choose a PDF or drag & drop
Type the amount, pick the GST rate, and choose whether GST is to be added or is already included.
Amount (₹)
The amount is Before GST — add GST Including GST — remove GST
Sale Within the state (CGST + SGST) To another state (IGST)
Enter an amount to see the tax breakup.
📋 Copy breakup
Type any amount — it is written in words the Indian way (lakh, crore) for cheques, bills and vouchers.
Amount (₹)
📋 Copy words
Make a QR code customers can scan. A UPI payment QR opens Google Pay, PhonePe, Paytm or any UPI app with your details filled in.
QR code for 💳 UPI payment 🌐 Website link 💬 WhatsApp chat 📞 Phone call 📝 Any text
Type your text in the box below.
Size Small (300 px) Medium (600 px) Large — for printing (1000 px)
✨ Make QR code ⬇️ Download PNG
Type a product code to get a printable barcode. Code 128 works for any letters and numbers; EAN-13/UPC are for retail products.
Code
Type Code 128 (any text) EAN-13 (retail, 13 digits) UPC-A (12 digits) Code 39
Height Short Normal Tall
✨ Make barcode ⬇️ PNG ⬇️ SVG (for printing)
Paste or type text to count words and characters, and change its case in one tap.
Your text
UPPERCASE lowercase Title Case Sentence case Remove extra spaces
📋 Copy text Clear
Convert to JPG PNG WebP
Quality: 70%
Largest side Keep original size 2560 px 1920 px (recommended) 1280 px (WhatsApp) 800 px (small)
🖼️
Choose images JPG, PNG or WebP · several at once
⬇️ Download all (ZIP) Start again
Home › Free tools › Ohm's Law CalculatorAbout the Ohm's Law Calculator Type any two values — volts, amps, ohms or watts — and the other two are worked out with the formula shown.
How to use Enter any two of V, I, R and P. The other two appear instantly. Change a value to recalculate — the last two typed are used. Frequently asked questions Which formula is used? V = I × R and P = V × I (also P = I²R and P = V²/R).
Can I use mA or kΩ? Enter plain units (A, Ω); the answer shows mA, kΩ etc. automatically.
Free tool by Debnath Electronic , Khowai, Tripura. Works on phones and computers — nothing to install.
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