TOMMSEL

SiteTraceKit is a technical website, domain and trust-signal checker for public web addresses. It reviews HTTP, DNS, TLS, RDAP, security headers, technologies, indexability and archive hints, then explains the findings in context.

Client side web app with Pomodoro, countdown, stopwatch, interval, study and fullscreen timers. No accounts, no database, local browser settings and multilingual content.

Browser based calculator for electricity costs, PV, storage, EV charging and financial projections. Inputs are calculated locally, without accounts and without a central database of user values.

Browser based tool for importing and previewing website ZIPs, HTML files and local web demos. Focused on safe preview, local asset resolution and blocked risky file types.

Privacy-first security tool for assessing links, QR codes and potentially risky destinations before opening. Local pattern checks, risk hints and clear limits instead of false security guarantees.

Privacy-friendly web app for scanning, checking, creating and designing QR codes and barcodes directly in the browser. No accounts, no backend API, no database and local processing.

Free web app with 18 interactive ranking, voting and decision tools. From tier lists to tournament brackets to spinner wheels. All in the browser, no account needed.

Over 25 finance, real estate and tax calculators for Germany. From gross-to-net to mortgage to ETF savings plans. Free, in the browser, no data on servers.

18 professional image editing tools that run entirely in your browser. No uploads, no account, no limits. Your images never leave your device.

Bidirectional converter between Office documents and Markdown with 14 engines, 10 templates and AI optimizer. 100% local in the browser.

Free video editor that runs entirely in the browser. 13 editor tools, batch processing, social media presets and audio editing. No installation, no uploads.

Free 3D CAD tool in the browser with visual builder and code editor. For makers, 3D printing enthusiasts and students. Runs offline as PWA. A companion browser extension is in development.

Web app for exchanging texts, links and files between your own devices. Runs in the browser and uses Supabase Auth, Realtime and temporary storage for published cross device workflows.

Browser extension for Chrome and Firefox that automatically protects you from fraud, phishing and tracking while you browse. Over 157,000 known scam sites are blocked, more than 70 IP loggers detected and 45 dangerous protocols stopped.

Browser extension for Chrome and Firefox with price comparisons, market trends, competition analyses and integrated fee calculator directly on eBay.

Online tool for removing sensitive metadata from photos, PDFs and documents. Processing directly in the browser, nothing is uploaded. For GDPR compliant workflows.

Free online tool for detecting AI generated texts. Confidence score and color marking of suspicious passages. For teachers, editors and recruiters.

Create links that self destruct after a certain number of clicks. For time limited offers, exclusive invitations and one time downloads.

Web platform for tracking all subscriptions, contracts and recurring costs. With cancellation reminders, payment calendar and European country comparison.

Web based platform for managing small and medium businesses. CRM, project management, invoicing and financial overview in one dashboard.

Collection of useful keyboard shortcuts and hotkey references for Windows, macOS, VS Code, Photoshop and many more applications.

Visualizes your lifetime in various representations. Weeks, months and years at a glance. A visual reminder to use time consciously.

Collection of free image editing tools: crop, resize, compress, convert and filter. All in the browser without upload.

Collection of useful mini tools: JSON formatter, Base64 encoder, hash generator, Lorem Ipsum generator and more. Free in the browser.

Reference and copy tool for Unicode characters. Search for special characters, emojis and symbols and copy with one click.

Collection of free online calculators for percentages, compound interest, unit conversion and more. For everyday life, studies and work.

Collection of free network tools: IP lookup, DNS queries, port checking and network information. For developers and administrators.

Collection of precise time and date tools: world clock, countdown timer, time calculator, stopwatch and Unix timestamp converter. Free in the browser.

Free online converter for XML files. Convert XML to JSON, CSV, YAML and other formats and vice versa. Directly in the browser.

Converts HTML pages and HTML code into PDF documents. Enter a URL or paste code and get a cleanly formatted PDF.

Universal file converter for images, documents and data formats. PNG to JPG, PDF to Word, JSON to CSV and much more. Directly in the browser.

Planned website audit tool for SEO, crawlability, indexability, performance, privacy, tracking, conversion and technical baseline security. URL scans will likely need a backend.

Planned redaction tool for PDF, PNG and JPG with manual redaction, metadata cleanup, recheck and secure export modes. Designed as a local browser/PWA solution.

Planned web app for garden planning, bed and area editor, seasonal planning and guide pages. The focus is local storage and privacy-friendly planning workflows.

All in one personal finance platform with cashflow tracking and portfolio management in one tool. No bank integration, browser based OCR for bank statements. Documents stay local.

All in one monitoring platform for solo developers and small teams. 9 or more check types: uptime, SSL, DNS, breach, domain, zombie and more. Alerts via Telegram, email and webhook.

SaaS platform for managing license keys. Create, validate and manage through a ready made API and SDKs without your own infrastructure.

Browser extension for Chrome with price analytics and portfolio tracking for Cardmarket sellers. Track card prices and manage inventory more efficiently.