Add your FITS file
Drop one or more .fits files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
FITS to CSV
Converting a .fits font to .csv repackages the same glyphs and metrics for a different delivery target. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop FITS files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Flexible Image Transport System to CSV table
Converting a .fits font to .csv repackages the same glyphs and metrics for a different delivery target. A .fits file is the standard data format of astronomy: one or more header-data units, each a block of human-readable 80-character keyword cards followed by an N-dimensional array or a table. Essentially every professional telescope and space observatory writes it, and the format has been backwards-compatible since 1981.
A .csv file is a comma-separated values table: plain-text rows with commas between fields, optionally quoted. It is probably the most widely produced data format in existence, emitted by everything from banking portals to lab instruments. For this route the practical draw is supported by effectively every data tool ever written and human-readable and hand-editable in a pinch — balanced against no type information — Excel famously strips leading zeros and mangles dates on open, which is worth knowing before you commit a large batch.
Why convert FITS to CSV?
The practical trigger for this conversion is usually a mismatch: with .fits, the 2880-byte block padding wastes space and reflects hardware nobody has used in decades. Switching to .csv buys you supported by effectively every data tool ever written, which is why it is the better fit for exports from databases, CRMs, and banking systems. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
FITS vs CSV at a glance
| Aspect | Flexible Image Transport System (.fits) | CSV table (.csv) |
|---|---|---|
| Format type | Lossless — every pixel or sample is preserved exactly | Text-based — characters and structure, so there is no visual quality loss |
| How it stores data | headers are ASCII cards of exactly 80 characters, in the form KEYWORD = value / comment, padded into 2880-byte blocks — a size inherited from magnetic tape | fields containing commas, quotes, or newlines are wrapped in double quotes with embedded quotes doubled — the rule that breaks every naive split-on-comma parser |
| Strongest at | telescope and space-observatory imagery and spectra | exports from databases, CRMs, and banking systems |
| Weak spot | the 2880-byte block padding wastes space and reflects hardware nobody has used in decades | no type information — Excel famously strips leading zeros and mangles dates on open |
Pick CSV as the output
Select .csv in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if CSV is selectable, the route is real and validated.
Convert on your device
Press Convert. The font tables are parsed and rewritten locally with fonteditor-core; glyph outlines, hinting, and kerning survive the trip.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid CSV file. Outputs keep the original filename with the .csv extension.
FITS to CSV questions, answered
Will converting FITS to CSV lose quality?
There is no visual quality to lose — fits is lossless-oriented and csv is text-oriented, so the question is structural fidelity. Text, ordering, and basic structure are preserved; complex layout, embedded objects, and styling beyond the target's model are simplified.
Is it private to convert FITS files here?
Yes — the .fits file is processed inside your browser tab and never uploaded. The font tables are parsed and rewritten locally with fonteditor-core; glyph outlines, hinting, and kerning survive the trip. Close the tab and the file is gone from memory.
Where will the CSV file work?
Every spreadsheet, database, and programming language handles CSV, and browsers or text editors open it as plain text. The catch is dialect drift: delimiter, encoding, and quoting choices differ enough that robust importers always offer manual overrides.
Will the CSV file be bigger or smaller than my FITS?
It depends on the content: fields containing commas, quotes, or newlines are wrapped in double quotes with embedded quotes doubled — the rule that breaks every naive split-on-comma parser. Convert one representative file first and compare before batch-processing a large set.
What happens to the metadata in my FITS file?
In .fits, header cards, including WCS and instrument keywords, are read and exported into the JSON output; PNG carries no channel for them, which is why the loss is stated rather than assumed obvious. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.