Software Alternatives, Accelerators & Startups

Processing.js VS Klartab

Compare Processing.js VS Klartab and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Processing.js logo Processing.js

Processing.js is an open programming language, port of the ...

Klartab logo Klartab

Log hours, export reports, and manage approvals - built for freelancers.
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  • Processing.js Landing page
    Landing page //
    2023-09-16
  • Klartab
    Image date //
    2026-05-12

Klartab is two opinionated tools built around one idea: do the obvious thing well, then stop.

Klartab Time is a timesheet tool for freelancers who bill by the hour. There's no live timer, no activity tracking, no bloat - just a clean monthly calendar where you log hours per project, export a PDF, and get paid. It handles multiple clients, currencies, and rates without any conversion surprises. Hour caps per work order nudge you before you accidentally over-bill a retainer. Once a month is invoiced, you lock it - server-side, no edits, no surprises.

Klartab Agency is the companion app for staffing agencies and boutique placement shops. Define work orders centrally, invite your contractors, and every submitted timesheet lands in one filtered inbox - defaulted to what's pending. Review with a full time-entry breakdown and a comment thread, approve to lock the period, or reject with a reason so the freelancer can resubmit in place. No invoicing, no payouts - deliberately out of scope.

The two tools work together but don't depend on each other. Use either one in isolation. Connect both, and any freelancer placed through your agency gets Klartab Time at no extra cost.

Both products are EU-hosted (Belgium), GDPR-ready, and built without behavioural advertising. Your data stays yours - and deleting your account is a one-click cascade.

Processing.js features and specs

  • Easy Transition from Processing
    Processing.js allows developers familiar with the Processing programming language to easily transition their applications to the web environment without needing to rewrite significant portions of code.
  • Web-based Graphics
    Developers can leverage Processing.js to create visually appealing graphics that run directly in a web browser, eschewing the need for additional software like Java applets.
  • Interactive Visualizations
    The library supports dynamic and interactive visualizations, making it ideal for projects that require animated graphics and user interaction.
  • Open Source
    Being an open-source project, Processing.js fosters a community-driven development model where developers can contribute to and expand the library’s capabilities.
  • Quick Setup
    Processing.js requires only a simple script inclusion to start developing, making it relatively easy and quick to set up for those wanting to prototype graphics quickly.

Possible disadvantages of Processing.js

  • Performance Overhead
    Running animations and graphics through a JavaScript library in the browser can have performance limitations, especially when dealing with complex or resource-intensive tasks.
  • Browser Compatibility Issues
    Processing.js can have compatibility issues with different web browsers, which can lead to inconsistent visualizations across platforms.
  • Limited Community and Support
    The library has a relatively smaller user base compared to more recent JavaScript graphics libraries, meaning less community support and fewer updates.
  • Deprecated
    The project is effectively deprecated, as it hasn't received updates in recent years, and modern alternatives like p5.js offer more features and active development.
  • Not Full JavaScript Utility
    Since it's primarily designed to replicate the Processing language, it may not always take full advantage of typical JavaScript idioms or integrate seamlessly with other JavaScript frameworks.

Klartab features and specs

  • Simple and intuitive interface
    Klartab offers a clean, straightforward browser tab management experience that is easy to understand and use without a steep learning curve.
  • Tab organization
    Klartab helps users organize and manage their browser tabs more effectively, reducing clutter and improving productivity when working with multiple tabs.
  • Lightweight solution
    As a tab management tool, Klartab aims to be a lightweight browser extension that doesn't consume excessive system resources compared to having many unmanaged tabs open.
  • Improved productivity
    By providing better tab overview and management capabilities, Klartab can help users stay focused and find the tabs they need more quickly, improving overall workflow efficiency.
  • Clean new tab experience
    Klartab provides a customizable and organized new tab page that can replace the default browser new tab with a more useful and visually appealing dashboard.

Analysis of Klartab

Overall verdict

  • I don't have verified, up-to-date information about Klartab (klartab.com) in my knowledge base, so I can't confirm its legitimacy, quality, or reputation with confidence. Before using or trusting this service, I'd recommend conducting independent research.

Why this product is good

  • I have no reliable data on this specific domain to evaluate its offerings, security, or user experiences
  • Lack of verifiable information could indicate the site is very new, niche, or not widely reviewed
  • I cannot confirm business legitimacy, ownership, or track record without current data

Recommended for

  • Anyone considering this service should first check independent review sites like Trustpilot or Better Business Bureau
  • Users should verify the site's SSL certificate, privacy policy, and terms of service directly
  • Look up domain registration details and company information through WHOIS lookups
  • Search for recent user reviews and complaints on forums or social media
  • Consult consumer protection resources if the site involves financial transactions or personal data

Category Popularity

0-100% (relative to Processing.js and Klartab)
Javascript UI Libraries
100 100%
0% 0
Invoicing
0 0%
100% 100
Charting Libraries
100 100%
0% 0
Time Management
0 0%
100% 100

Questions & Answers

As answered by people managing Processing.js and Klartab.

Why should a person choose your product over its competitors?

Klartab's answer:

Choose Klartab if you want tools that respect your time and your data, without the noise.

  • Radical simplicity — most time-trackers try to do everything: live timers, activity screenshots, integrations, AI insights. Klartab Time does one thing: log hours per project, export a clean report, get paid. No hidden complexity.
  • Privacy-first — EU-hosted (Belgium), GDPR-ready, no behavioural advertising. Your data is never monetised.
  • Fair, transparent pricing — one flat price with no tiers or per-feature upsells. Freelancers placed through a Klartab Agency agency get Klartab Time included at no extra cost.
  • Purpose-built agency workflow — Klartab Agency replaces the spreadsheet-and-email approval loop with a proper submissions inbox, comment threads, approve/reject workflow, and period locking. Competitors either ignore agencies or bundle too much.
  • No lock-in — month-to-month, cancel any time, data stays accessible read-only for 60 days after cancellation.

What makes your product unique?

Klartab's answer:

Klartab is built around a single philosophy: do the obvious thing well, then stop. Unlike bloated all-in-one tools, Klartab offers two deliberately focused products — Klartab Time for freelancers and Klartab Agency for staffing agencies — each solving one problem without scope creep.

  • No live timer, no activity tracking — Klartab Time records totals over an interval, keeping things simple and respectful of your privacy.
  • EU-hosted and GDPR-ready — all data lives in europe-west1 (Belgium); no behavioural advertising, and your data stays yours.
  • Tight integration between the two tools — freelancers placed through a Klartab Agency get Klartab Time at no extra cost, with a clean submission and approval workflow.
  • One flat price per tool, no tiers, no upsells — €10/month for Klartab Time; €100/month + €5/active seat for Klartab Agency.

How would you describe the primary audience of your product?

Klartab's answer:

Klartab serves two distinct audiences that often work together:

Freelancers (Klartab Time) Independent contractors who bill multiple clients at different rates and currencies. Specifically: - Mixed-client freelancers who need clean per-project PDF reports at month-end without manual spreadsheet work. - Retainer-heavy contractors on fixed-hour engagements who need cap tracking to avoid over-billing. - Freelancers placed through staffing agencies who need a simple way to submit timesheets for approval.

Staffing & Placement Agencies (Klartab Agency) Boutique agencies (typically 5–30 contractors) that place freelancers with end clients and need to manage the time-approval workflow centrally. This includes working agency owners who both manage their team’s submissions and log their own hours as a placed freelancer.

What's the story behind your product?

Klartab's answer:

Klartab was built out of a frustration with tools that do too much. The founding philosophy is simple: identify the one obvious thing a tool should do, do it well, and stop there.

Klartab Time started as a timesheet tool for freelancers who were tired of live timers, activity tracking, and surveillance-style software. The goal was a clean, manual log — hours per project, your rate, a PDF for the client — without any of the noise.

Klartab Agency followed as the natural companion for the agencies that place those freelancers. Instead of chasing submissions over email and reconciling spreadsheets, agencies get a purpose-built inbox with approve/reject workflows, comment threads, and period locking.

Both products share the same values: EU-hosted, GDPR-ready, no behavioural advertising, transparent flat pricing, and a deliberate refusal to expand scope beyond what’s needed. The Klartab suite is built for people who want software that gets out of the way.

Which are the primary technologies used for building your product?

Klartab's answer:

Klartab is built on Google Cloud infrastructure:

  • Cloud Run — for serverless container hosting
  • Cloud SQL — for the relational database (PostgreSQL), hosted in europe-west1 (Belgium)
  • Firebase Authentication — for user auth
  • Stripe — for billing and payments (with Stripe Tax for EU VAT handling)

The web app is fully responsive and works well on mobile browsers. Native iOS and Android apps are on the roadmap.

Who are some of the biggest customers of your product?

Klartab's answer:

Klartab is an early-stage product and does not publicly list named customers. The typical customers are:

  • Independent freelancers billing multiple clients across different currencies
  • Retainer-heavy contractors managing fixed-hour engagements
  • Boutique staffing and placement agencies (typically 5–30 contractors) that need a structured approval workflow for timesheet submissions

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Processing.js and Klartab

Processing.js Reviews

The Best Data Visualization Tools - Top 30 BI Software
Processing.js is a JavaScript library that uses the Processing visual programming language. It is web-oriented and lets you bring the power of Processing to create data visualizations for your web pages. Processing.js requires an HTML5-compatible browser to work.
Source: improvado.io

Klartab Reviews

We have no reviews of Klartab yet.
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Social recommendations and mentions

Based on our record, Processing.js seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Processing.js mentions (1)

  • What are the main differences between processing.js and processing.py?
    With processing.js I think you mean p5.js, since the development of processing.js has been archived in 2018 (https://github.com/processing-js/processing-js ). Source: over 3 years ago

Klartab mentions (0)

We have not tracked any mentions of Klartab yet. Tracking of Klartab recommendations started around May 2026.

What are some alternatives?

When comparing Processing.js and Klartab, you can also consider the following products

Paper.js - Open source vector graphics scripting framework that runs on top of the HTML5 Canvas.

Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.

GoJS - GoJS is a JavaScript library for building interactive diagrams on HTML web pages. Build apps with flowcharts, org charts, BPMN, UML, modeling, and other visual graph types.

Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.

p5.js - JS library for creating graphic and interactive experiences

Zoho Invoice - 100% free online invoicing software for small businesses.