File Viewers for the Files Nobody Explained
If you have started building things with an AI assistant, you have probably been handed a file you cannot read: an API response, a config export, a dataset. These viewers open them in your browser and tell you, in plain English, what is inside — how many records, which fields, where the problem is if it will not open. They exist here rather than on one of the big formatter sites for one reason: files like these routinely contain API keys, tokens and personal data, and nothing on this page ever leaves your device.
JSON Viewer
Open a JSON or JSONL file and see what is in it: a plain-English summary, a searchable tree, and errors with the exact line and column. Free, never uploaded.
Open toolCSV Viewer
Open a CSV or TSV file as a sortable table, see what each column holds, and fix Excel exports whose Korean or accented text shows up garbled. Free, never uploaded.
Open toolPages Opener
Open an Apple .pages document without a Mac: read the text and tables, save the pictures, and get it as a Word file — all in your browser. Nothing is uploaded.
Open toolVCF to Excel
Turn a .vcf contacts export from iPhone, Android, iCloud or Google into an Excel sheet or CSV — Korean and accented names intact, phone numbers kept exactly. Never uploaded.
Open toolGuides & Articles
Long-formHow to Open a JSON File — and Understand It
What records and lists are, how to read a data export like a table, and how to fix the file when it will not open.
How to Open a CSV File — and Read It Like a Spreadsheet
What a CSV really is, why columns shift, and how to open one without Excel mangling it.
Why Your CSV Shows Garbled Characters in Excel
The encoding mix-up behind “ÇѱÛ” and “é”, and the two-minute fix that keeps it from coming back.
How to Open a .pages File Without a Mac
Read an Apple Pages document on Windows or Android — text, tables and pictures — and save it as Word.
How to Export iPhone or Android Contacts to Excel
Get a .vcf out of your phone, iCloud or Google, and turn it into a clean spreadsheet with every number intact.
Open a Markdown (.md) File
README files and notes rendered with tables, checklists and code — and saved as a PDF if you need to share them.
Why open files here?
Explained, Not Just Indented
A plain-English summary says what the file holds — a list of 120 records with 8 fields — before you read a single bracket.
Errors You Can Fix
A broken file shows the exact line and column, the offending line itself, and the usual causes in words.
Keys Stay Private
Config files and API dumps are read in your browser and never uploaded, so the secrets inside them stay yours.