Percentage Calculator
Calculate X% of Y, percentage change, and more. 100% offline.
Launch ToolChoose Your Tool
Every tool is client-side — your data never leaves your browser.
Age Calculator
Find your exact age in years, months, and days with next birthday countdown.
Launch ToolWord Counter
Real-time word, character, sentence count + reading and speaking time.
Launch ToolUnit Converter
Convert length, weight, temperature, speed and volume instantly.
Launch ToolJSON Formatter & Validator
Beautify and validate JSON instantly. Your data never leaves your browser.
Launch ToolLatest Guides & Resources
Learn how to maximize your profits and streamline your workflow.
Creator Economy
How Much Do YouTubers Make in 2026?
A breakdown of RPMs, CPMs, and how much a channel with 100k subscribers actually earns.
E-commerceThe Ultimate Guide to Amazon FBA Fees
Understand referral fees, fulfillment costs, and storage fees to ensure you remain profitable.
SaaSSaaS Metrics Explained: MRR, ARR, & Churn
A deep dive into the KPIs every SaaS founder needs to track to secure funding and grow.
Image & Photo Utilities
100% private, client-side image processing. No uploads, instant results.
QR Code Generator
Create completely custom, static QR codes instantly. Customize colors and error correction locally.
Design
Launch Tool
Color Palette Extractor
Upload any inspiration image to extract its dominant color and a beautiful 5-color palette.
Design
Launch Tool
Google SERP Simulator
Optimize your Meta Titles and Descriptions to see exactly how they will appear in Google Search Results.
SEO
Launch Tool
Image Watermarker
Protect your product photography by adding a secure text watermark locally in your browser.
Images
Launch Tool
Image Compressor
Reduce image file size instantly without losing visible quality. Perfect for SEO and fast loading sites.
Launch ToolImage Resizer
Resize images for social media, YouTube thumbnails, and web platforms with smart aspect ratio preservation.
Launch ToolImage Converter
Convert your images between WEBP, PNG, and JPG locally. Modern formats for better performance.
Launch ToolImage Cropper
Crop images with an interactive, beautiful interface. Supports free-form and fixed aspect ratios.
Launch ToolBackground Remover
Remove image backgrounds instantly using local AI models in your browser. 100% private.
Launch ToolPDF Processing Hub
Manage your documents safely without uploading them to any third-party servers.
QR Code Generator
Create completely custom, static QR codes instantly. Customize colors and error correction locally.
Design
Launch Tool
Color Palette Extractor
Upload any inspiration image to extract its dominant color and a beautiful 5-color palette.
Design
Launch Tool
Google SERP Simulator
Optimize your Meta Titles and Descriptions to see exactly how they will appear in Google Search Results.
SEO
Launch Tool
Image Watermarker
Protect your product photography by adding a secure text watermark locally in your browser.
Images
Launch Tool
Merge PDFs
Combine multiple PDF documents into a single file securely and instantly.
Launch ToolSplit PDFs
Extract exactly the pages you need from a PDF and save them as a new file.
Launch ToolPDF to Image
Convert every page of your PDF into high-quality JPG or PNG images instantly.
Launch ToolImage to PDF
Turn your images into a single, organized PDF file quickly and securely.
Launch ToolPDF Compressor
Reduce PDF file size without losing quality. Ideal for email attachments.
Launch ToolVideo & Audio Toolbox
Heavy-duty media processing powered by WebAssembly. No massive file uploads.
QR Code Generator
Create completely custom, static QR codes instantly. Customize colors and error correction locally.
Design
Launch Tool
Color Palette Extractor
Upload any inspiration image to extract its dominant color and a beautiful 5-color palette.
Design
Launch Tool
Google SERP Simulator
Optimize your Meta Titles and Descriptions to see exactly how they will appear in Google Search Results.
SEO
Launch Tool
Image Watermarker
Protect your product photography by adding a secure text watermark locally in your browser.
Images
Launch Tool
Video Compressor
Shrink huge video files efficiently directly in your browser using FFmpeg.
Launch ToolVideo Converter
Convert video files to MP4, WebM, MOV, or AVI easily.
Launch ToolVideo to GIF
Turn any video clip into a high-quality animated GIF instantly.
Launch ToolVideo Trimmer
Cut and trim videos securely. Loseless extraction right in your browser.
Launch ToolAudio Converter
Convert audio or video to MP3, WAV, FLAC, and more securely.
Launch ToolAudio Trimmer
Cut songs, podcasts, and audio clips directly from your browser.
Launch ToolWhy ToolsTechBox?
Instant Results
All calculations happen live in your browser as you type — no loading screens, no waiting.
Privacy First
We collect zero data. Every calculation runs locally — your numbers never touch any server.
Always Accurate
Fee structures are kept current for 2026. We update tools every time platforms change their rates.
Latest from the Blog
Tips, guides, and deep-dives for sellers and makers.
Etsy
March 27, 2026
How Etsy Fees Work in 2026: Everything Sellers Need to Know
A complete breakdown of listing fees, transaction fees, payment processing, and Offsite Ads — and exactly how each one eats into your profit margin.
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3D Printing
March 27, 2026
How to Price Your 3D Prints for Profit (With Real Examples)
Most 3D printing sellers undercharge. Learn how to factor in filament, electricity, printer depreciation, your time, and platform fees to set a price that actually makes money.
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Business
April 3, 2026
How Much Does TikTok Shop Pay Affiliates in 2026?
Discover exactly how much TikTok Shop pays affiliates and creators in 2026. Real conversion rates and averages.
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