Ga naar de inhoudBewerk spreadsheets met formules, opmaak en meerdere bladen — lokaal automatisch opgeslagen in de browser.
Need a quick budget, task list or project plan without opening Excel or Google Sheets? Tentaco Spreadsheet Studio is a full workbook editor that runs entirely in your browser tab.
Create cells, use formulas (SUM, IF, AVERAGE and more), format numbers and text, manage multiple sheets, import CSV or exported JSON workbooks, and export results when you are done. Workbooks autosave to IndexedDB on your device — nothing is uploaded to our servers by default.
Optional encrypted device sync lets you continue the same workbooks on another laptop or phone with your recovery key. Free, no account required.
Open Spreadsheet Studio
Create a blank sheet or pick a template
Edit, format and add formulas
Export CSV/JSON or sync to another device
Workbooks stay on your device unless you enable optional encrypted sync. We cannot read synced ciphertext without your recovery key.
For personal budgets, lists and lightweight tables — yes. It is browser-local, privacy-friendly and does not require a Google account. Heavy Excel macros and native .xlsx editing are not supported.
In IndexedDB in your browser. Enable encrypted device sync to back up ciphertext to Tentaco servers and open the same workbooks on another device.
SUM, AVERAGE, MIN, MAX, COUNT, COUNTA, IF, ROUND and basic arithmetic between cell references.
CSV naar JSON — converteer tabelgegevens
Converteer CSV-plak of upload naar JSON-arrays - beheer scheidingstekens en headers.
afprijstabel — gratis online tool
Gratis afprijstabel op Tentaco — lokale browserverwerking, geen account vereist.
Code Studio online – gratis
Formatteer, valideer en converteer JSON, XML, SQL, HTML, CSS, JS en meer – één werkruimte voor ontwikkelaars.
HTML-editor online – gratis
HTML/CSS/JS-projecten met meerdere bestanden met live preview, IndexedDB-opslag en statische ZIP-export van de site.
Data Studio online – gratis
CSV, TSV, querystrings en tabeltools in één werkruimte.
