3 MB FLAC sample
A FLAC file of exactly 3,145,728 bytes. It is a valid Free Lossless Audio Codec file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 3 MB sample, test or dummy FLAC file.
Download
sample-flac-3mb.flac
3 MB3,145,728 bytes
Download 3 MB FLACCreated in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.
- Type
- audio/flac
- SHA-256
46c9a6f419a6fc46b10b8a1461679dc09823999b576f42aa6bfc410250c130f9- Delivery
- Created in your browser from static generator assets (how it works).
What is in this file
192 FLAC frames (17.8 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 byte of a standard PADDING metadata block bring the file to the exact size.
| Duration | 17.8 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-3mb.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 00 00 00 |fLaC..."........|
00000010 00 00 0a c4 42 f0 00 0b fd e5 45 0e a4 8c c9 a3 |....B.....E.....|
00000020 9c 80 29 d8 81 c8 cd 60 8a 01 04 00 00 77 19 00 |..)....`.....w..|
00000030 00 00 53 61 6d 70 6c 65 54 65 73 74 46 69 6c 65 |..SampleTestFile|Preview
Creates the file in your browser and shows it here.
Where 3 MB matters
A 3,145,728-byte file, 3 MB in the binary units that operating systems and upload limits use. It is useful wherever a form, an API gateway, a storage quota or a mail server is configured with a limit of about this size.
Use this file for
- Finding the first upload limit in a new stack
- Testing audio upload where lossless input is accepted
- Checking transcoding to MP3, AAC or Opus
Testing notes for FLAC
- Cover art lives in the metadata, so a three-minute song can carry several megabytes before its first audio frame.
- Some tagging tools put an ID3 tag in front of the stream. The signature then no longer sits at byte 0, and a strict parser rejects a file that most players accept.
Technical details
| File name | sample-flac-3mb.flac |
|---|---|
| Format | FLAC (Free Lossless Audio Codec) |
| Extension | .flac |
| MIME type | audio/flac |
| Size | 3,145,728 bytes (3 MB) |
| Kind | Binary |
| Signature | 66 4C 61 43 |
| SHA-256 | 46c9a6f419a6fc46b10b8a1461679dc09823999b576f42aa6bfc410250c130f9 |
| Created | 2026-10-23 |
| Validation | See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility. |
| Preview | Available on this page |
| Source | Generated in your browser by this site's generator; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Audio |
Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Verify your copy
This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.
sha256sum sample-flac-3mb.flac # Linux
shasum -a 256 sample-flac-3mb.flac # macOSOn Windows, run Get-FileHash sample-flac-3mb.flac -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.
Related files
Questions about this file
- Is this file exactly 3 MB?
- Yes. It is 3,145,728 bytes, which is 3 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 3 MB FLAC file?
- 192 FLAC frames (17.8 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 byte of a standard PADDING metadata block bring the file to the exact size.
- Why are the FLAC samples about as large as the WAV samples?
- To reach an exact byte count, the samples store their audio in "verbatim" subframes, the uncompressed form FLAC falls back on when prediction does not help. The files are fully valid, and decode to exactly the same samples as the WAV files.