Free PDF Tools, Construction Calculators & Image Tools

EkZapp is a free online utility tools platform offering 70+ tools across PDF, image, calculator, business, and text categories. Instead of installing separate software for every small file or number task — merging a couple of PDFs, converting a cheque amount into words, checking your income tax under both regimes — EkZapp puts all of it in the browser, ready to use in seconds. The site launched in mid-2026 and has grown from a handful of PDF utilities into a full set of tools covering document editing, image processing, Indian financial calculators, and everyday business needs like invoices and QR codes.

How the tools work

Most PDF and image tools on EkZapp run on the server — you upload a file, the tool processes it using the same libraries professional software relies on (PyMuPDF and pypdf for PDFs, Pillow for images), and you download the result. Calculators and converters that don't need file processing, like the Income Tax Calculator or the Amount in Words converter, run entirely as JavaScript in your browser instead, so the numbers you type are calculated instantly without ever being sent anywhere.

Upload or enter your input — a file, an image, or a set of numbers, depending on the tool.
The tool processes it immediately — no queue, no waiting for a batch job, no email confirmation step.
Download or read your result — directly from the same page, with nothing further to install or configure.

This server-plus-browser split keeps things fast for calculators while still allowing file-heavy operations like merging PDFs or removing image backgrounds, which genuinely need server-side processing to work reliably across devices.

Privacy & security

Files uploaded to EkZapp are transferred over an encrypted (HTTPS) connection and processed only for the specific task requested — they are not scanned for unrelated data, shared with third parties, or used to build any kind of profile. Once your download is ready, uploaded and generated files are automatically cleaned up from the server rather than kept indefinitely, so nothing lingers longer than it needs to.

For tools that don't require server processing at all — calculators, the amount-in-words converter, and similar utilities — your input never leaves your browser in the first place, which is the strongest privacy guarantee any online tool can offer: there's simply nothing to intercept or store, because nothing is transmitted.

Why no signup is needed

A lot of free tool sites ask for an email address or account creation before letting you use even a basic feature — often just to build a marketing list, not because the tool actually needs it. EkZapp skips that step entirely. None of the 70+ tools require registration, a password, or a confirmed email, because a one-off task like compressing a PDF or checking a percentage shouldn't come with the overhead of managing yet another account.

The tradeoff is that there's no saved history or account dashboard — each visit is self-contained. For the kind of quick, specific tasks EkZapp is built for, that tradeoff generally favors speed and privacy over convenience features most people wouldn't use anyway.

What tool categories does EkZapp cover?

PDF Tools (20+) — merge, split, compress, unlock, protect, sign, edit, and convert PDFs to and from Word, Excel, PowerPoint, HTML, and images.
Image Tools — resize, compress to an exact KB target, convert formats (including HEIC to JPG), remove backgrounds, generate favicons, and prepare passport or exam photos to exact official specifications.
Calculators — income tax (old vs new regime), GST, EMI, SIP, BMI, age, date, percentage, tip, calorie, CFT, cement, steel weight, concrete, sand volume, land area, brick estimation, tile quantity, paint quantity, in-hand salary, HRA exemption, and amount-in-words, built around real Indian financial and construction use cases.
Business Tools — invoice generator, QR code generator, password generator, currency converter, unit converter, signature generator, and resume builder.
Text & developer tools — word counter, case converter, JSON formatter, Base64/URL encoder, timestamp converter, barcode generator, and more, aimed at quick one-off tasks rather than a full development environment.

New tools are generally added after the same specific, narrow requirement shows up repeatedly — an exam board's exact photo size rule, a bank's cheque-writing convention, a tax regime comparison people keep asking about — rather than copying whatever a competitor already offers.

What makes EkZapp different from other free tool sites

Plenty of sites offer a single free PDF or image tool, but usually with a catch — a watermark on the output, a hard file-size cap that pushes you toward a paid plan, or a signup wall before the actual conversion happens. EkZapp doesn't add watermarks, doesn't gate results behind an account, and keeps free-tier limits generous enough for real everyday tasks rather than deliberately too small to be useful. Ads support the site instead of a subscription model, which is also why the tools stay free rather than shifting to a paywall over time.

EkZapp is built and maintained by Ekramul Hoque, a solo developer based in India, as a side project alongside a full-time day job. There's no team or support desk behind the site — the code, the tool design, and every bug report are handled by one person, which is also why new tools and content are added gradually rather than all at once. Read more about the story behind EkZapp and the people who use it on the About page.

Frequently Asked Questions

Common questions about using EkZapp

Are the tools on EkZapp really free?

Yes. Every tool on EkZapp — PDF, image, calculator, and business tools — is completely free to use, with no hidden premium tier or paywalled feature.

Do you store my uploaded files?

No. Uploaded files are processed for your specific task and then cleaned up shortly after — they are not stored long-term, browsed, or used for anything beyond generating your download.

Is signup required to use the tools?

No signup or account creation is required for any tool on EkZapp. You can use every tool directly without providing an email address.

Are my PDF and image files secure?

Files are transferred over an encrypted (HTTPS) connection and processed only for the task you requested. Files are not shared with third parties and are deleted from the server after processing.

How long are files kept on the server?

Uploaded and processed files are automatically deleted shortly after your download completes — typically within a couple of hours, and never kept indefinitely.

Who built EkZapp?

EkZapp is built and maintained by Ekramul Hoque, a solo developer based in India, as a side project alongside a full-time day job. Read more on the author page.

Is EkZapp safe to use?

Yes. All file transfers use an encrypted HTTPS connection, uploaded files are processed only for the requested task and deleted shortly after, and no signup or personal data collection is required to use any tool.

Do the tools work on mobile phones?

Yes. Every tool on EkZapp, including the PDF, image and construction calculator tools, works directly in a mobile browser without needing an app install.

Are PDFs processed on the server or locally in my browser?

Most PDF and image tools process your file on the server using the same libraries professional software relies on, then delete it shortly after. Calculators like the CFT, Land Area, and Income Tax calculators run entirely in your browser, so nothing is uploaded at all for those.

Is there a file size limit on EkZapp?

EkZapp supports free processing for files up to 50 MB, which comfortably covers typical PDF, image and document tasks.

Which construction calculators does EkZapp offer?

EkZapp currently offers CFT, Cement, Steel Weight, Concrete, Sand, Tile, and Brick calculators, plus a Paint Calculator and a Land Area Converter (Bigha, Katha, Decimal, Acre and more, state-wise for India).