
calculator.net
Omni Calculator
Material Unit Converter
10015.io
IT Tools
CodeBeautify
iLovePDF
1,164 free online calculators, converters and tools — finance, health & math calculators, 652+ unit converters, plus text, PDF, image, SEO and QR tools. Fast, private, no sign-up.

UTM.io
MZIFT UTM Builder
Simple UTM Manager
UTM Mind
UTM Tools
Link Central
linkutm
Free UTM builder: create tagged GA4 campaign URLs in seconds. Add source, medium & campaign, save presets, export CSV and copy clean tracking links.

Which is more popular?
Based on our record, Utilorax seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | utilorax.com | devlet.tech |
| Pricing | — | |
| Platforms | ||
| Company | Startup from Pakistan · 1 - 9 employees · 2026 | Startup from the United Kingdom · 20 - 49 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


Utilorax is a collection of 1,100+ free online tools: 116 calculators, 652 unit converters, and 394 text, developer, SEO, image, PDF and template utilities. Everything runs inside the browser. Files are processed locally and are never uploaded to a server, so PDFs, images and documents stay on...
Devlet UTM Builder is a free, browser-based campaign URL generator designed specifically for digital marketers and advertisers. Built to ensure your tracking data is perfectly formatted for Google Analytics 4 (GA4), this tool takes the hassle out of manual UTM tagging. Core Features: GA4-Ready...
What each product offers, as listed by its team.


Walkthroughs and reviews on video.
Utilorax — Free Online Tools
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Utilorax and Devlet UTM Builder.
Utilorax's answer
Two things. First, most of the tools never send your data anywhere — 63 of the file tools run entirely in your browser, and the ones that do need a server (certain PDF and Office conversions) delete the file the moment they are done. Second, the same operations are available as a free JSON API with 203 endpoints, which almost no free tools site offers.
Add to that 1,162 tools in one place, no account for anything, five languages, and it installs as a PWA and keeps working offline.
Utilorax's answer
The competitors listed here are each good at one thing — Calculator.net and Omni for calculators, IT Tools and CodeBeautify for developer utilities, 10015.io for the everyday mix. Utilorax covers that whole span in one place, so you are not learning a new site for each small job.
The real difference is the developer API. If you need a conversion or a hash once, use the page; if you need it a thousand times, the same thing is a JSON endpoint with a free key. And nothing asks you to sign up first.
Utilorax's answer
Two groups. Most visitors want a single answer and then to leave — convert a unit, work out a loan payment, compress a PDF — and they should not have to create an account for that.
The second group is developers, who reach the same operations through the JSON API instead of the page. The site is in English, Spanish, French, Portuguese and Chinese, so a good part of the audience is not reading in English.
Utilorax's answer
It came out of irritation. I kept opening a different site for every small job — one for a unit conversion, one to compress an image, one to count words — and most of them wanted an upload or a sign-up for something my own browser could do perfectly well.
So I built the whole set in one place and made the browser do the work wherever it could. It went live on 29 July 2026 and is run from Karachi.
Utilorax's answer
Share your experience with using Utilorax and Devlet UTM Builder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Preg_match_all('~^\s*Sitemap:\s*(\S+)~mi', $robots, $sm); $ours = 'https://utilorax.com/sitemap.xml'; $foreign = array_filter($sm[1], fn($u) => rtrim($u) !== $ours); If (!in_array($ours, $sm[1], true)) { $problems[] = 'robots.txt... - Source: dev.to / 26 days ago
Tracking Devlet UTM Builder since Sep 2026.
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