500 KB FLAC sample file

A FLAC file of exactly 512,000 bytes. It is a valid Free Lossless Audio Codec file, generated for this site and checked with an independent parser. Use it wherever you need a 500 KB sample, test or dummy FLAC file.

sample-flac-500kb.flac

500 KB512,000 bytes

Download 500 KB FLAC

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Type: audio/flac
SHA-256: 06457a08260da57d31bc8ae0167960fe47f9c5703005c12a73b75b67e1d61c1d
Direct URL: https://www.sampletestfiles.com/downloads/flac/sample-flac-500kb.flac

What is in this file

32 FLAC frames (2.9 s) of a synthesised musical phrase that repeats every eight seconds. The samples are stored verbatim, so the audio decodes bit for bit to the matching WAV data. 1 bytes of a standard PADDING metadata block bring the file to the exact size.

Duration	2.9 s
Sample rate	44,100 Hz
Channels	2 (stereo)
Bit depth	16-bit
Block size	4,096 samples
Encoding	Verbatim subframes (lossless, not compressed)
Tags	Vorbis comment (title, artist, album)

First bytes of the file

The first 64 bytes of sample-flac-500kb.flac as a hex dump: offset, bytes, then the same bytes as text. The FLAC signature is 66 4C 61 43.

00000000  66 4c 61 43 00 00 00 22 10 00 10 00 00 0e 10 00  |fLaC..."........|
00000010  40 0a 0a c4 42 f0 00 01 f3 81 fe 94 9a e0 36 ee  |@...B.........6.|
00000020  c2 eb 2d d8 26 4b 1e a3 fc 04 04 00 00 87 25 00  |..-.&K........%.|
00000030  00 00 53 61 6d 70 6c 65 54 65 73 74 46 69 6c 65  |..SampleTestFile|

Preview

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Where 500 KB matters

A 512,000-byte file: larger than most API body limits, smaller than most upload limits. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Amazon DynamoDB items	400 KB per item	500 KB cannot be stored as a single item.
Express body parsers	100 KB by default	Rejected unless the limit is raised.
nginx request body	1 MB by default (client_max_body_size)	Accepted with room to spare.

All 500 KB sample files

Use this file for

Typical image-upload tests
Testing that a decode matches the stored MD5 checksum
Testing audio upload where lossless input is accepted

Testing notes for FLAC

The MD5 checksum in STREAMINFO lets software prove that a decode is correct, yet few applications check it. A value of all zeros means the encoder did not record one.
Cover art lives in the metadata, so a three-minute song can carry several megabytes before its first audio frame.

FLAC format reference

Technical details

File name	sample-flac-500kb.flac
Format	FLAC (Free Lossless Audio Codec)
Extension	.flac
MIME type	audio/flac
Size	512,000 bytes (500 KB)
Kind	Binary
Signature	66 4C 61 43
SHA-256	06457a08260da57d31bc8ae0167960fe47f9c5703005c12a73b75b67e1d61c1d
Created	2026-10-10
Validation	Exact size, signature bytes and structure checked when the file was generated
Preview	Available on this page
Source	Generated for this site; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	Audio

Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked

Download from the command line and verify

Fetch the file with curl, then compare its checksum with the SHA-256 value above.

curl -o sample-flac-500kb.flac 'https://www.sampletestfiles.com/downloads/flac/sample-flac-500kb.flac'
sha256sum sample-flac-500kb.flac     # Linux
shasum -a 256 sample-flac-500kb.flac # macOS

On Windows, run Get-FileHash sample-flac-500kb.flac -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.

Related files

Questions about this file

Is this file exactly 500 KB?: Yes. It is 512,000 bytes, which is 500 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 500 KB FLAC file?: 32 FLAC frames (2.9 s) of a synthesised musical phrase that repeats every eight seconds. The samples are stored verbatim, so the audio decodes bit for bit to the matching WAV data. 1 bytes of a standard PADDING metadata block bring the file to the exact size.
What audio is on the FLAC samples?: A short synthesised musical phrase that repeats, as 16-bit stereo at 44,100 Hz. It was generated by code for this site and is free of any music copyright.

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