FTS to YUV Converter

Change FTS format to YUV — quick online tool

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Remote Processing

The heavy lifting of FTS to YUV conversion happens on cloud servers — your computer or phone stays fast and unaffected.

No Install Needed

The converter runs entirely in your browser — no desktop software required. Works on all major platforms and devices alike.

Batch Processing

Convert multiple FTS images to YUV in one session. Queue your images and let the converter process them all without manual repetition.

How to convert FTS to YUV

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose yuv or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your yuv file right afterwards

About formats

FTS is a file extension for the Flexible Image Transport System (FITS), the standard data format used in astronomy since 1981 when it was defined by Don Wells, Eric Greisen, and R.H. Harten at the National Radio Astronomy Observatory, and subsequently endorsed by the International Astronomical Union in 1982. FITS was designed from the outset as a self-describing archival format: each file begins with one or more 2880-byte header blocks containing ASCII keyword-value pairs that describe the data's dimensions, coordinate system, observation parameters, and provenance, followed by data blocks in a variety of numeric types — 8/16/32/64-bit integers and 32/64-bit IEEE floating-point values. FITS supports multi-dimensional arrays (images, data cubes, hypercubes), binary tables for catalog data, and ASCII tables, with multiple Header/Data Units (HDUs) that can coexist in a single file. The format handles specialized astronomical data: spectral cubes, radio interferometry visibilities, multi-extension mosaic images from CCD arrays, and time-series photometry. One advantage is scientific rigor: FITS mandates that all metadata needed to interpret the data physically — coordinate transformations (WCS), photometric calibration, telescope and instrument parameters — travels with the file, eliminating the metadata-loss problem that plagues general-purpose image formats in scientific contexts. The format's longevity and institutional backing is another strength — virtually every observatory, space telescope (Hubble, James Webb, Chandra), and astronomical software package (DS9, IRAF, Astropy) uses FITS as its primary data format.
Developer: NASA / IAU
Initial release: 1981
YUV is a raw pixel data format storing images in the Y'UV color model, where image data is separated into a luminance component (Y', representing brightness) and two chrominance components (U/Cb and V/Cr, representing color difference signals). The YUV color model originated with analog color television broadcasting — specifically the NTSC system adopted in 1953 and the PAL system in 1967 — where backward compatibility with existing black-and-white receivers required separating brightness from color information. In digital imaging, the ITU-R BT.601 standard (1982) formalized the digital YCbCr encoding derived from the analog YUV model, defining the conversion matrices and sample precision used by virtually all digital video and broadcast systems. YUV raw files contain no header, compression, or metadata — they are flat sequences of luminance and chrominance samples in a specified ordering (4:4:4, 4:2:2, 4:2:0, or other subsampling ratios), requiring external specification of dimensions, bit depth, and subsampling scheme. The 4:2:0 subsampling mode (where chrominance has half the horizontal and half the vertical resolution of luminance) is particularly common, used by H.264, H.265, AV1, and most consumer video codecs. One advantage is direct video pipeline compatibility: YUV data is the native input format for video encoders, hardware display controllers, and camera sensor ISPs, making raw YUV the most direct representation for frame-accurate video processing and analysis. The perceptual efficiency of the YUV color model is another fundamental strength — separating luma from chroma enables effective subsampling that halves or quarters the color data with minimal visible impact. YUV data is processed by FFmpeg, ImageMagick, and all video processing tools.
Developer: ITU-T (CCIR)
Initial release: 1982

Frequently Asked Questions

Why convert FTS to YUV?

Raw luminance/chrominance data for video work — converting FTS to YUV gives your astronomical images broader reach and easier sharing across standard platforms.

What programs open YUV?

Most image viewers and editors handle YUV — Photoshop, GIMP, IrfanView, and built-in viewers on Windows, macOS, and Linux.

Will my image lose quality?

Quality depends on the target format. YUV raw color output preserves data within its format constraints — no unnecessary degradation occurs.

Is the conversion instant?

Near-instant for typical images — the cloud-based processing handles FTS to YUV conversion quickly. Very large data may take a moment.

What platforms are supported?

The converter works on any device with a browser — Windows, macOS, Linux, iOS, Android. No platform-specific software needed.