Private by design
Every calculation and image edit happens on your own device. Photos you resize or compress are never uploaded to a server.
Free · No sign-up · Runs in your browser
Free online tools for images, text, code and everyday maths.
125 fast, private utilities in one place. Resize and compress images, count words, format JSON, and work out loans, percentages, and unit conversions in seconds.
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Featured tools
The everyday essentials: image editing, writing, data, and money calculators. Open one and get a result straight away.
- Image Tools
Local Image Resizer
Fit a PNG or JPEG into a maximum width and height while retaining aspect ratio and…
- Image Tools
Local Image Re-encoder and Compressor
Re-encode at original dimensions with a JPEG/WebP quality setting, or use lossless PNG. Lower quality often…
- Image Tools
Local PNG / JPEG / WebP Converter
Convert supported PNG/JPEG input to PNG, JPEG, or browser-supported WebP at unchanged dimensions. Download a file…
- Text Tools
Word and Unicode Character Counter
Paste text to count whitespace-separated words, Unicode code points, UTF-16 units, non-whitespace characters, lines, and UTF-8…
- Developer Tools
JSON Pretty Printer
Parse genuine JSON and serialize it with a chosen indentation of 1–8 spaces. JSON is parsed,…
- Calculators
Percentage Calculator
Find a chosen percentage of any numeric amount, including signed changes. Enter the amount and percentage…
- Finance
Fixed-Rate Loan Payment
Calculate equal monthly payments and total interest for a fully amortizing fixed-rate loan. Fees and irregular…
- Investment
Monthly Investment Plan
Estimate the future value of equal monthly contributions. Choose whether each contribution is invested at the…
- Investment
Compound Interest
Project a starting balance compounded a specified number of times each year. This model assumes a…
- Date & Time
Calendar Age
Calculate completed calendar years on an explicit reference date rather than dividing elapsed days by 365.…
- Health & Fitness
Adult BMI
Calculate body mass index from kilograms and centimetres. This is a basic adult screening number, not…
- Creator Tools
Secure Random Password Generator
Generate 1–20 passwords, each 8–128 characters, using Web Crypto and unbiased sampling. Select all symbols, alphanumeric…
Image Tools
Resize, compress, convert, and crop PNG or JPEG images right in your browser.
Text Tools
Count words, change case, clean whitespace, sort lines, and more.
Developer Tools
Format JSON, encode Base64 and URLs, escape HTML, and hash text.
SEO Tools
Build UTM links, robots.txt files, meta tags, and JSON-LD schema.
Calculators
Percentages, averages, ratios, fractions, equations, and progressions.
Finance
Loan EMI, discounts, sales tax, profit margin, tips, and bill splitting.
Investment
Compound interest, SIP, lump sum, CAGR, and savings goal planning.
Unit Converters
Convert length, area, weight, temperature, speed, data, and more.
Date & Time
Calculate age, days between dates, add dates, and count workdays.
Health & Fitness
BMI, BMR, and daily calorie target estimates.
Education
GPA, CGPA, grade averages, attendance, and exam targets.
Land & Property
Land area, plot cost, fencing cost, and earthwork volume.
Creator Tools
Aspect ratio, file size, CTR, CPM, passwords, UUIDs, and invoices.
- Audience Engagement Rate
- Audio File Size Estimate
- Average Cost per Click
- Bitrate from File Size
- Click-Through Rate
- Cost per Thousand Impressions
- HEX to RGB and HSL
- Image Aspect Ratio
- Local HTML Invoice Generator
- Proportional Resize Dimensions
- Random UUID v4 Generator
- Return on Ad Spend
- Revenue per Thousand Views
- Secure Random Integer
- Secure Random Password Generator
- Video File Size Estimate
- Visitor Conversion Rate
Why Toolnest
Online tools that respect your time and your files
Instant results, no sign-up
No account, no download, no waiting in a queue. Open a tool, enter your values, and get the answer immediately.
The method is always shown
Each calculator lists its formula, a worked example, and its limits, so you can check the maths instead of trusting a black box.
Works on any device
Pages are lightweight and responsive, so tools load quickly on a phone, tablet, or laptop, even on a slow connection.
Popular ways people use these tools
Shrink a photo before emailing it with the image compressor or image resizer, prepare a blog post with the word counter, tidy an API response with the JSON formatter, or plan a home loan with the EMI calculator. Investors compare scenarios with the SIP calculator and compound interest calculator, and students check results with the GPA calculator.
Questions
Frequently asked questions
Are these online tools really free?
Yes. Every tool on this site is free to use, with no account, trial, or usage limit.
Are my files and inputs uploaded anywhere?
No. The tools process your inputs and supported image files locally in your browser, without a processing server. The website itself still makes normal hosting requests, and any analytics or advertising the operator enables may have their own privacy terms.
Which image formats are supported?
The image resizer, compressor, converter, and cropper accept PNG and JPEG files up to 12 MiB and export PNG, JPEG, or WebP where your browser supports it. Keep a copy of your original file.
Can I rely on a calculation for an important decision?
Treat results as informational estimates. Check each tool’s formula, units, and limitations, and confirm financial, tax, health, property, or legal decisions with a qualified professional.
Do the tools work on mobile?
Yes. The site is fully responsive and every tool works in modern mobile browsers. Interactive tools need JavaScript enabled.