About Online Convertio
Online Convertio is a collection of free utilities for people who work with files and data every day: students preparing for government exams, job seekers, developers, analysts and office teams. You will find an exam photo and signature resizer, a typing speed test, an age calculator for exams, a resume and biodata maker, an image compressor, a PDF toolkit, a video converter, a CSV converter, a bulk QR code generator and a set of converters for programmers.
Why we built it
Many online converters ask you to upload your file to a remote server. That is a poor fit for customer lists, contracts, invoices or private videos. We built Online Convertio so the work happens on your own device. You open a page, pick a file, and the result is made right there in your browser.
How it works
Our tools run in your browser using JavaScript, WebAssembly and open-source libraries such as pdf-lib, pdf.js and JSZip. The files you choose are processed in your device's memory and are not sent to us. Close the tab and nothing is left behind. Because the work uses your own device, very large files can be slow, and we say so on the pages where it matters.
What you can do here
- Exam photo and signature resizer: resize photos and signatures to the exact size and KB that SSC, IBPS, SBI, UPSC and passport forms ask for.
- Typing speed test: practise English and Hindi typing for SSC, court and clerk exams and see your WPM and mistakes.
- Age calculator for exams: check your age on the cutoff date, with OBC, SC, ST and other relaxations.
- Resume and biodata maker: fill in a simple form and download a clean PDF.
- Data converter: CSV to JSON, SQL or a Markdown table.
- Bulk QR codes: make hundreds of codes from a list.
- Image compressor: shrink and convert JPG, PNG and WebP.
- PDF toolkit: merge, split, compress, rotate and convert PDF files.
- Video converter: MP4, MOV, MKV, AVI, WebM and more.
- Developer converters: string to number, object to JSON string, boolean, Base64 and more.
Our principles
- Privacy first: your files stay on your device.
- Free to use: every tool works without paying or signing up. The site may be supported by advertising.
- Plain language: each tool comes with simple instructions, examples and answers to common questions.
- Honest limits: we tell you what a tool cannot do, so you do not lose time.
Our guides
Our blog has short how-to articles written in simple language. They explain the ideas behind the tools, such as how to shrink images for a faster website or why a text value "false" can still count as true in code.
Contact
Questions, bug reports or ideas for a new tool? Please use our contact page or email umishra900@gmail.com. We read every message.