PDF Merge
Combine multiple PDF files into one organized document.
Open →21 verified tools across 5 categories
Everyday tools that show their work
Converters, calculators and file utilities that run in your browser. Every tool states what it assumes and where it stops.
No sign-up for any published tool Most tools process input in your browser Limitations documented on every tool page
How NovaTools works
- Nothing uploaded for local tools Converters and calculators run in your browser. Tools that need a network source say so on the page.
- Limits written down Every published tool lists what it assumes, the range it accepts and what it will not do.
- Refuses rather than guesses Out-of-range or undefined input returns the reason, not a plausible-looking number.
- No account, no paywall Every tool listed here is usable without signing in. Nothing is gated.
Recently used
Kept in this browser only. Nothing is sent anywhere.
Featured
Tools You Can Start With Today
Quick-start cards for PDF, image, developer and finance workflows.
Image Compressor
Reduce image file sizes for web and email workflows.
Open →Live Exchange Converter
Convert currency estimates with live-data and cached fallback handling.
Open →Age Calculator
Calculate exact age from birthdate. Years, months, days, and next birthday countdown.
Open →BMI Calculator
Calculate Body Mass Index and health category. Height and weight based calculation with health tips.
Open →Number Base Converter
Convert signed whole integers exactly between Binary, Decimal, Hexadecimal, and Octal using browser BigInt. Fractions are not supported.
Open →Percentage Calculator
Calculate percentages, increases, decreases, and ratios. Multiple calculation modes.
Open →Roman Numerals Converter
Convert between Arabic numbers and Roman numerals. Supports 1-3999 with history and examples.
Open →Scientific Calculator
Advanced scientific calculator with scientific functions, memory operations, and calculation history.
Open →Time Zone Converter
Convert between the listed IANA time zones using date-specific browser Intl timezone data. Ambiguous or nonexistent DST wall times are rejected.
Open →Unit Converter
Convert between different units of measurement. Length, weight, temperature, volume, and area units.
Open →Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Get current timestamp instantly.
Open →Invoice Generator
Create professional invoices with automatic calculations. Download as PDF.
Open →Mortgage Calculator Turkey
Free Turkish mortgage calculator with KKDF and BSMV tax calculations. Calculate monthly payments and total interest.
Open →ROI Calculator
Calculate return on investment (ROI), net profit and annualized return (CAGR). Runs entirely in your browser.
Open →Compound Interest Calculator
Calculate compound interest with monthly contributions. See your investment growth over time.
Open →Crypto Price Tracker
Track popular crypto prices and 24-hour changes through a cached server-side proxy.
Open →Stock Quote Lookup
Check a basic stock quote through the NovaTools live-data proxy without exposing client API keys.
Open →Image Flipper
Mirror images horizontally or vertically. Both directions, quick preview and download.
Open →PDF Compressor
Rewrite PDF structure in your browser with pdf-lib and compare the output size. Page images are not downsampled, so size reduction is not guaranteed.
Open →PDF Splitter
Split PDF into individual pages. Extract specific pages or ranges.
Open →
Categories
Browse by Category
Organized collections of tools for real work. Click a category to explore.
7 more categories are in development and are not listed until their tools pass certification.
PDF Tools
Edit and convert PDFs
3 tools
Image Tools
Optimize and edit images
2 tools
Finance Tools
Calculators for your money
6 tools
Converters
Convert anything
9 tools
Design Tools
Create visuals
1 tool
Workflows
Browser-Based Tools vs Desktop Software: Privacy Comparison
Start with a task, not a menu
Use guided entry points that connect a tool, a checklist, and the next useful step.
Prepare a PDF for email
Compress the file, confirm readability, then use the PDF checklist before sending.
Publish lighter images
Resize, compress and review file names before uploading images to a site or email.
Guides
View All Articles →
From the NovaTools Blog
Practical articles that explain when to use a tool and what to check before exporting.
How to Choose the Right Online Tool for Faster Workflows
A practical checklist for selecting browser tools by privacy, output quality, and repeatability.
Image Compression vs. Resizing: Which One Preserves Quality?
Learn when to compress, when to resize, and how to avoid blurry assets across the web.
Base64 Encoding: Practical Uses, Limits, and Security Notes
Understand where Base64 helps, where it adds overhead, and why it is not encryption.