1
Text and File Hash Calculator
defuse.ca/checksums.htmAlso covers security and security tools · same kind of website
The Text and File Hash Calculator computes hashes such as MD5, SHA-1, SHA-256, SHA-512, and Whirlpool.
Alternatives
The Best Big Number Calculator Alternatives in 2026
24 alternatives1 free · 1 open source
Looking for something like Big Number Calculator? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 1 are free or have a free plan and 1 are open source.
About Big Number Calculatordefuse.ca/big-number-calculator.htm
VisitBig Number Calculator evaluates very large mathematical expressions in a web browser.
Top picks at a glance
First suggestionText and File Hash CalculatorThe Text and File Hash Calculator computes hashes such as…Free or freemium optionOTP AuthManage two-factor authentication codes with OTP Auth, an…Open source optionmasscanScan TCP ports with masscan, an asynchronous scanner…Another optionData Structure : Infix Postfix Prefix - Converter & EvaluatorThis converter changes infix expressions into postfix or…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Text and File Hash Calculator | — | Not stated | Web, Windows |
| 2 | Data Structure : Infix Postfix Prefix - Converter & Evaluator | — | Not stated | Web |
| 3 | Anubis | — | Not stated | Web |
| 4 | RSA encryption, decryption and prime calculator | — | Not stated | Web |
| 5 | masscan | — | Yes | — |
| 6 | OTP Auth | Freemium | Not stated | iOS, Web |
| 7 | Binary Ninja | — | Not stated | Linux, macOS, Web |
| 8 | Mozilla SSL | — | Not stated | Web |
| 9 | Nmap | — | Not stated | Linux, Web, Windows |
| 10 | HTML Sanitizer Tool | — | Not stated | Web, Windows |
All Big Number Calculator alternatives
2
Data Structure : Infix Postfix Prefix - Converter & Evaluator
raj457036.github.io/Simple-Tools/prefixAndPost…Also covers security and security tools · same kind of website
This converter changes infix expressions into postfix or prefix notation and shows the steps.
3
Anubis
anubis.techaro.lolAlso covers security and security tools · same kind of website
Protect a website from automated bot requests with Anubis, which evaluates incoming HTTP requests.
4
RSA encryption, decryption and prime calculator
canihavesomecoffee.github.io/js-rsa-toolAlso covers security and security tools · same kind of website
This RSA calculator supports prime generation, encryption, and decryption.
5
Also covers security and security tools · open source
Scan TCP ports with masscan, an asynchronous scanner designed for large network ranges.
6
Also covers security and security tools · same kind of website · free plan
Manage two-factor authentication codes with OTP Auth, an iOS app listed on the App Store.
7
Binary Ninja
binary.ninja/freeAlso covers security and security tools · same kind of website
Binary Ninja supports software reverse engineering and can be tried in a browser or installed as a desktop application.
8
Also covers security and security tools · same kind of website
Generate secure SSL configurations for selected web, database, and mail software.
9
Nmap
nmap.orgAlso covers security and security tools · same kind of website
Discover hosts and map networks with Nmap, a network exploration and security scanning tool.
10
HTML Sanitizer Tool
defuse.ca/html-sanitize.htmAlso covers security and security tools · same kind of website
This HTML sanitizer tool converts text with special characters into HTML-safe output.
11
Kismet
kismetwireless.netAlso covers security and security tools · same kind of website
Kismet monitors and captures Wi-Fi network traffic, with wireless intrusion detection and wardriving features.
12
x86 and x64 Intel Assembler
defuse.ca/online-x86-assembler.htmAlso covers security and security tools · same kind of website
The online assembler converts x86 and x64 instructions into machine-code bytes.
13
Results
nmap.org/ndiffAlso covers security and security tools · same kind of website
Ndiff compares Nmap scan results from two XML files, showing changes such as hosts and ports appearing or disappearing.
14
WFC
binisoft.org/wfc.phpAlso covers security and security tools · same kind of website
Manage Windows Firewall rules and receive outbound connection notifications with Windows Firewall Control.
15
GoPlus Locker V3
gopluslabs.ioAlso covers security and security tools · same kind of website
GoPlus offers Web3 security tools including audits, APIs, a user security hub, and a browser extension.
16
BrowserLeaks
browserleaks.comAlso covers security and security tools · same kind of website
Test a browser for privacy leaks, including exposed IP addresses, device information, and fingerprinting risks.
17
Webkay
webkay.robinlinus.comAlso covers security and security tools · same kind of website
See what information a website can access from your browser with Webkay, a browser data demonstration.
18
Cover Your Tracks
coveryourtracks.eff.orgAlso covers security and security tools · same kind of website
Test how trackers and fingerprinting systems see your browser with Cover Your Tracks from the EFF.
19
Graphviz Online
dreampuf.github.io/GraphvizOnlineAlso covers security and security tools · same kind of website
Graphviz Online renders graph descriptions into diagrams in a browser.
20
BrowserScan
browserscan.netAlso covers security and security tools · same kind of website
Check browser fingerprints and run DNS leak, IP, port, and WebRTC tests with BrowserScan.
21
HTML editor
onlinehtmleditor.devAlso covers security and security tools · same kind of website
This HTML editor supports writing and converting HTML, including Word-to-HTML conversion in a browser interface.
22
Convert text to image file
text2image.com/enAlso covers security and security tools · same kind of website
This browser-based converter turns user-supplied text into an image file for downloading or use in other documents.
23
CreepJS
abrahamjuliot.github.io/creepjsAlso covers security and security tools · same kind of website
Test browser fingerprinting characteristics with CreepJS, which displays fingerprint and WebRTC results.
24
challenges.re
challenges.reAlso covers security and security tools · same kind of website
Solve reverse engineering challenges published on challenges.re, a challenge-focused site.
No alternatives match this filter.
Alternatives to similar tools
OTP Auth24 alternativesMozilla SSL24 alternativeschallenges.re24 alternativesGoPlus Locker V324 alternativesResults24 alternativesText and File Hash Calculator24 alternatives
TopicSecurity Tools · 202 sites Best-of list8 Best Free Authenticator Apps for Codes and Recovery ListingBig Number Calculator details
What is the best alternative to Big Number Calculator?
Based on features, tags and platforms, the closest alternatives to Big Number Calculator are Text and File Hash Calculator, Data Structure : Infix Postfix Prefix - Converter & Evaluator, and Anubis.
Is there a free alternative to Big Number Calculator?
Yes. OTP Auth is free or offer a free plan.
Are there open-source alternatives to Big Number Calculator?
Yes: masscan.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative