ToolNest Articles & Guides
Short, practical guides for everyday tasks — each one ends at a free tool that does the job in your browser.
Free Online Calculators: EMI, GST, Age, BMI and More — All in One Place
Free online calculators for EMI, GST, age, BMI, percentage, discount and more. No signup, no app — every calculator runs in your browser on ToolNest.
QR Code and Barcode Tools: Create, Scan and Print Codes for Free
Create QR codes for links, UPI and Wi-Fi, scan QR codes without an app, and generate barcodes for your shop — free online tools that run in your browser.
Free PDF Tools Online: Merge, Split, Convert and Edit PDFs — Without Uploading Your Files
Merge, split, rotate and convert PDFs online for free — without uploading your files to any server. PDF to JPG, images to PDF, page numbers and more.
Free Image Tools Online: Compress, Resize, Convert and Edit Photos in Your Browser
Compress photos for online forms, resize images, convert JPG, PNG and WebP, crop, add filters and text — free image tools that run in your browser.
Free Text Tools Online: Word Counter, Case Converter, JSON Formatter and More
Word counter, case converter, remove extra spaces, duplicate line remover, JSON formatter, slug generator and more free text tools — no signup, in your browser.
Image Tool Guides
Image Resize — How to Use It Online for Free
Change the size of a photo — type your own width/height or scale it by percentage. For YouTube thumbnails, profile photos, anything.
Image Converter — How to Use It Online for Free
PNG to JPG, JPG to WebP — change the format in a single click. WebP is the lightest format, best for websites.
Image Compressor — How to Use It Online for Free
Shrink the file size of a photo so it sends quickly on WhatsApp, email or a website. Move the slider and watch the size change live.
Image Crop — How to Use It Online for Free
Cut a photo down to the part you need — 1:1 for a profile photo, 16:9 for a thumbnail, or a completely free size. Choose the area with sliders.
Image Rotate & Flip — How to Use It Online for Free
Fix an upside-down photo — rotate it by 90°, or flip it like a mirror image.
Photo Filters — How to Use It Online for Free
Change the look of a photo — black & white, old-style sepia, or set the brightness, contrast and saturation yourself.
Write Text on Photo — How to Use It Online for Free
Put big, clear text on an image — for a thumbnail headline, a poster or a quote photo. With a dark outline the text stays readable on any photo.
Favicon Generator — How to Use It Online for Free
Make a small website icon (favicon) from your photo or logo — every size from 16px to 512px, ready to download. For browser tabs and phone home screens.
SVG to PNG — How to Use It Online for Free
Convert an SVG file or SVG code into a PNG image — at exactly the size you need, so it can be used anywhere.
PDF Tool Guides
PDF Merge — How to Use It Online for Free
Combine two or more PDF files into one — for joining documents, notes and forms. The pages stay in the order you add the files.
PDF Split — How to Use It Online for Free
Pull just the pages you need out of a big PDF — for example pages 2–5, or 1, 3, 7. A new PDF is created with only those pages.
Images to PDF — How to Use It Online for Free
Turn photos into a single PDF — for scanned documents, notes or a photo album. The pages follow the order in which you choose the images.
PDF to JPG — How to Use It Online for Free
Turn every page of a PDF into a separate JPG image — so you can share or post a page like a photo.
PDF Rotate — How to Use It Online for Free
Straighten upside-down or sideways scanned pages — rotate by 90°, 180° or 270°, all pages or just a few.
PDF Page Delete — How to Use It Online for Free
Permanently remove useless or wrong pages from a PDF — a clean new PDF is made from the remaining pages.
Add Text to PDF — How to Use It Online for Free
Stamp the same text on every page — CONFIDENTIAL, DRAFT, your name or a date. A light diagonal watermark or clean text at the bottom, as you prefer.
PDF to Text — How to Use It Online for Free
Extract all the text written inside a PDF — copy and paste it anywhere, or download it as a .txt file. (A scanned-image PDF has no extractable text.)
PDF Page Numbers — How to Use It Online for Free
Put a number on every page — in 'Page 1 of 10' style. Essential for reports, books and long documents.
QR & Barcode Guides
QR Code Generator — How to Use It Online for Free
Create a QR code for any link or text — a video link, a website, Wi-Fi, anything. Download it as a PNG and use it anywhere.
QR Code Scanner — How to Use It Online for Free
Upload a photo or screenshot that contains a QR code — the link or text hidden inside it is read and shown to you. No camera needed.
Barcode Generator — How to Use It Online for Free
Create a barcode from a number or code — for product labels, stock and bills. CODE128, EAN-13, UPC and CODE39 formats.
Text Tool Guides
Word Counter — How to Use It Online for Free
A script, article or essay — count how many words it has and how long it takes to read or speak, all live.
Case Converter — How to Use It Online for Free
Convert text to UPPER CASE, lower case, Title Case or Sentence case — handy for titles and headings.
Remove Extra Spaces — How to Use It Online for Free
Clean up copied-and-pasted text — remove double and triple spaces, delete empty lines and trim the ends of every line.
Password Generator — How to Use It Online for Free
Create a strong random password — long, with capital letters, numbers and symbols mixed in.
Lorem Ipsum Generator — How to Use It Online for Free
Generate dummy placeholder text for a design, a website draft or a document layout — paragraphs, sentences or words, as much as you need.
Remove Duplicate Lines — How to Use It Online for Free
Remove repeated lines from a list, names or data — every line survives only once, and the order stays exactly the same.
Sort Lines — How to Use It Online for Free
Sort the lines of a list A–Z or Z–A, reverse them, shuffle them, add numbers or delete the empty lines — all in one click.
Find & Replace — How to Use It Online for Free
Find a word or name anywhere in the text and change it everywhere at once — useful for renaming in a script or fixing a wrong spelling.
JSON Formatter — How to Use It Online for Free
Tidy up messy JSON, minify it or catch its errors — for API and data work.
Encoder / Decoder — How to Use It Online for Free
Convert text into Base64, URL encoding or HTML entities — and back again. For links, APIs and code.
Slug Generator — How to Use It Online for Free
Make a clean URL slug from a blog or video title — lowercase letters, hyphens between the words, no strange symbols. The right approach for SEO.
Text Reverse — How to Use It Online for Free
Reverse text — the characters reversed, the word order reversed, every word reversed, or the line order reversed.
Text to Speech — How to Use It Online for Free
Listen to written text read aloud — to catch mistakes in a script by ear, or to check English/Hindi by listening. The voice is the one built into your phone or computer.
Markdown Preview — How to Use It Online for Free
Write Markdown, see a live preview, copy the HTML — headings, bold, lists, quotes, code, everything.
Calculator Guides
Age Calculator — How to Use It Online for Free
Exact age from a date of birth — down to years, months and days. Plus the date of the next birthday.
Unit Converter — How to Use It Online for Free
Length, weight, temperature, area, volume, speed and data — km ↔ mile, kg ↔ pound, °C ↔ °F, convert everything instantly.
Color Picker — How to Use It Online for Free
Pick any colour and instantly get its HEX, RGB and HSL codes — perfect for thumbnails and design work.
BMI Calculator — How to Use It Online for Free
Work out your Body Mass Index (BMI) from your height and weight — and see the healthy weight range for your height too.
Percentage Calculator — How to Use It Online for Free
The three most useful percentage calculations in one place — a percentage of a number, one number as a percentage of another, and percentage change.
EMI Calculator — How to Use It Online for Free
Do the maths before taking a loan — the monthly instalment (EMI), the total interest and the total amount you will pay, all worked out in advance.
GST Calculator — How to Use It Online for Free
Add GST to a price, or separate the GST out of a GST-inclusive price — with the CGST and SGST shares shown. The calculation to do before making a bill.
Discount Calculator — How to Use It Online for Free
The real maths of a sale — how much you will actually pay after the discount and how much you saved. You can apply a second extra discount at the same time.
Date Difference — How to Use It Online for Free
How much time lies between two dates — in years, months, days and total days. For deadlines, projects or counting down the days to a special date.
Number to Words — How to Use It Online for Free
Write any number out in words — for cheques, bills and documents. Both Indian style (Lakh, Crore) and International style (Million, Billion).
Number Converter — How to Use It Online for Free
Convert a number between Binary, Octal, Decimal and Hex — and convert Roman numerals (I, V, X, L…) in both directions.
Random Number Generator — How to Use It Online for Free
Generate random numbers inside your chosen range — for a lucky draw, picking teams, OTP-style practice or any selection.
More Tool Guides
Stopwatch & Timer — How to Use It Online for Free
Two clock jobs in one — measure time with the stopwatch (with laps), or set a countdown timer that makes a sound when the time runs out.
Signature Maker — How to Use It Online for Free
Draw your signature with a mouse or your finger and download it as a PNG — with a transparent background, so it can be pasted onto a document or photo.