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A calmer way to get things done
Useful tools and practical information, built for everyday work.
Zobnu is a browser-based toolkit for people who need to resize images, convert files, check calculations, format data, or understand a task more clearly without switching between multiple websites. The library is organized around real jobs: file conversion, text cleanup, reporting, document work, image handling, developer utilities, and practical how-to guidance.
Why people use Zobnu
Useful for quick tasks, document cleanup, and file work.
Format and fix files
Convert images, PDFs, audio, and documents without leaving the browser. Many tools work locally so you can move from source file to output quickly.
Reduce friction in repetitive work
Clean text, compare data, generate slugs, format JSON, and prepare files for sharing, email, or publishing in a few steps.
Learn as you use the tools
Each workflow is paired with practical guidance, examples, and related tools so a user can understand the task rather than guess.
Start here
Browse all Popular tools
SIP Calculator
Estimate returns from a monthly investment plan.
GST Calculator
Add or remove GST from any amount in seconds.
Home Loan Calculator
Plan EMI, interest and total repayment for a loan.
Currency Converter
Convert currencies with current provider rates.
JSON Formatter
Format, validate, minify and copy JSON locally.
Base64 Encoder
Encode or decode text in your browser.
Choosing the right tool
Start with the input and the output you want.
Identify what you have
Is it a PDF, text file, image, audio file, CSV, JSON, or a number you need to calculate? The right tool usually follows the format of the input you already have.
Choose the target format
Do you need JPG, PNG, PDF, CSV, DOCX, MP3, or a cleaned text output? Matching the right source and target format helps avoid unnecessary conversion steps.
Review quality and limits
For file work, watch for format-specific limits, output quality tradeoffs, and browser APIs that may depend on the operating system or browser.
From the library
See all Latest useful articles
The article library explains common file, image, PDF, and data workflows in plain language and points to the exact Zobnu tools for the job.
How to compress JPEG images without unnecessary quality loss
Use the right quality level, test the file size, and avoid over-compressing images that will be printed or shared in important contexts.
Read articleJPEG vs PNG: when to use each
Choose the right image format based on photo content, transparency, and file size needs.
Read articleHow to convert images to PDF
Build a PDF from one image or a batch of images and choose the right workflow for your output.
Read article