TOOLS
Tools
Small, focused tools that run entirely in your browser: document editors that open and save real office files, and calculators built around our analysis. No sign-up, nothing sent to a server.
Online Excel (XLSX) editor
A free spreadsheet editor that runs in your browser — open, edit and save XLSX and CSV files without uploading them anywhere.
▶ Open tool MeNew WriteOnline Word (DOCX) editor
A free document editor that runs in your browser — open DOCX files, write with headings, tables and images, and save back to real DOCX.
▶ Open tool MeNew ShowOnline PowerPoint (PPTX) editor
A free presentation editor that runs in your browser — build slides with text and images, present full-screen, and save as real PPTX.
▶ Open tool MeNew PDFMerge, split and rotate PDF
A free PDF editor that runs in your browser — merge, split, reorder, rotate and export pages without uploading the file anywhere.
▶ Open tool MeNew HWPHWP file viewer, online
Read Hancom Hangul (.hwp, .hwpx) documents in your browser — useful on a Mac or Linux machine with no Hancom Office installed.
▶ Open toolAI API Cost Calculator
Estimate the monthly cost of an AI feature from token usage and per-token pricing — any model, any provider.
▶ Open toolAI Capex-vs-Revenue Gap Explorer
Adjust the growth assumptions behind the 2026 "AI bubble" debate and see in which year — if any — AI revenue catches up with AI infrastructure spending.
▶ Open tool