OptiPress

About OptiPress

OptiPress is a set of 64 free tools for images, PDFs, video, exam forms and code. They run entirely in your browser, so your files never leave your device.

Why it exists

Much of what people need to do with files is ordinary but urgent: get a photo under 50 KB for an exam form, shrink a PDF for an upload portal, unlock an Aadhaar PDF, or make a phone video small enough to email. Most websites that do this make you upload the file first, including ID documents, certificates and bank statements, and you have to trust they delete it afterwards.

Modern browsers are powerful enough to do the work themselves. So on OptiPress, compressing an image, merging PDFs, converting a video or formatting JSON all happen on your own device. There's nothing to upload, nothing to wait for, and no copy of your file on someone else's server.

What you'll find

  • Image tools (15): compress, convert, resize and read text from images.
  • PDF tools (14): merge, split, protect and convert PDF documents.
  • Video tools (9): compress, convert, trim and mute videos, or save the audio as MP3.
  • Social media tools (7): size photos, covers and thumbnails for every social app.
  • Student tools (13): calculators for exam age limits, CGPA, marks and attendance.
  • Developer tools (19): format, decode, test, hash and generate data and code.

Many tools also have shortcut pages for common jobs, such as compress JPEG to 50 KB, MOV to MP4 or the SSC CGL age calculator, and the blog has step-by-step guides.

How it works

  • Local processing. Each tool's code downloads with the page and runs in your browser. There's no server that receives your files.
  • Libraries on demand. Bigger features, such as the OCR engine, the video encoder or the MP3 encoder, load the first time you use them. That's code coming to your device, not your file going out.
  • Rules with sources. Exam age limits and CGPA formulas come from official notices and university documents, and each tool links to the one it uses.
  • Honest about limits. Each page says what the tool does and doesn't do, for example when a video is re-encoded or a PDF loses selectable text.
  • Free to use. No account, no paywall and no watermark. The site is paid for by ads from Google AdSense; the privacy policy lists the third-party services it uses.

Who's behind it

I'm Sujit Chanda, a senior software engineer in Kolkata, India. I've spent six years building Flutter apps, SaaS platforms and AI features, including exam-preparation and online-coaching platforms for students. OptiPress is an independent project that I build and maintain.

You can see more of my work at sujitchanda.in, or find me on GitHub and LinkedIn. Suggestions, bug reports and ideas for new tools are welcome at s.chanda@outlook.com.