2 MB Avro sample
An Avro file of exactly 2,097,152 bytes. It is a valid Apache Avro object container file file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 2 MB sample, test or dummy Avro file.
Download
sample-avro-2mb.avro
2 MB2,097,152 bytes
Download 2 MB AvroCreated in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.
- Type
- application/avro
- SHA-256
0d99f26b33d6cc4f9a48ab96040480fe1c5894acbad0860f67405ec8b0f7abfd- Delivery
- Created in your browser from static generator assets (how it works).
What is in this file
An object container file whose header carries the writer schema as JSON, followed by 17,032 binary-encoded customer records in 174 blocks. 183 bytes of filler in an extra header metadata entry, which readers ignore, bring the file to the exact size.
| Records | 17,032 |
|---|---|
| Blocks | 174, of up to 100 records |
| Schema | Customer record, 12 fields |
| Types used | long, string, double, boolean, enum, union, and the uuid and date logical types |
| Codec | null (not compressed) |
| Sync marker | 16 bytes after every block |
First bytes of the file
The first 64 bytes of sample-avro-2mb.avro as a hex dump: offset, bytes, then the same bytes as text. The Avro signature is 4F 62 6A 01.
00000000 4f 62 6a 01 06 16 61 76 72 6f 2e 73 63 68 65 6d |Obj...avro.schem|
00000010 61 d0 0a 7b 22 74 79 70 65 22 3a 22 72 65 63 6f |a..{"type":"reco|
00000020 72 64 22 2c 22 6e 61 6d 65 22 3a 22 43 75 73 74 |rd","name":"Cust|
00000030 6f 6d 65 72 22 2c 22 6e 61 6d 65 73 70 61 63 65 |omer","namespace|Preview
Avro files cannot be shown in a browser. Download the file and open it in an application that reads Avro, such as Apache Spark, Flink and Hive.
Where 2 MB matters
A 2,097,152-byte file: exactly the default upload limit of PHP, and twice the default of nginx and Spring Boot. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| PHP | 2 MB per uploaded file by default (upload_max_filesize) | A file of exactly 2 MB is accepted; one byte more is refused. |
| nginx | 1 MB by default (client_max_body_size) | Rejected with 413 Request Entity Too Large. |
| Spring Boot multipart | 1 MB per file by default (max-file-size) | Rejected unless the property is raised. |
| Django | 2.5 MB in memory by default | 2 MB is held in memory; the 5 MB sample is streamed to a temporary file. |
| Vercel Functions | 4.5 MB request body | Accepted, including as base64 at about 2.8 MB. |
Use this file for
- Finding the first upload limit in a new stack
- Testing ingestion jobs and bulk loaders
- Checking schema resolution between a writer and a reader
Testing notes for Avro
- No media type is registered for Avro, so files arrive labelled application/octet-stream as often as anything else. Detection has to rely on the four signature bytes.
- A logical type is an annotation on a plain type: a date is stored as an int counting days since 1970. A reader that ignores the annotation returns a number where a date was expected.
Technical details
| File name | sample-avro-2mb.avro |
|---|---|
| Format | Avro (Apache Avro object container file) |
| Extension | .avro |
| MIME type | application/avro |
| Size | 2,097,152 bytes (2 MB) |
| Kind | Binary |
| Signature | 4F 62 6A 01 |
| SHA-256 | 0d99f26b33d6cc4f9a48ab96040480fe1c5894acbad0860f67405ec8b0f7abfd |
| 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 | Not available for this file; details only |
| Source | Generated in your browser by this site's generator; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Data |
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-avro-2mb.avro # Linux
shasum -a 256 sample-avro-2mb.avro # macOSOn Windows, run Get-FileHash sample-avro-2mb.avro -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 2 MB?
- Yes. It is 2,097,152 bytes, which is 2 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 2 MB Avro file?
- An object container file whose header carries the writer schema as JSON, followed by 17,032 binary-encoded customer records in 174 blocks. 183 bytes of filler in an extra header metadata entry, which readers ignore, bring the file to the exact size.
- What schema do the Avro samples use?
- A Customer record of twelve fields: a long, strings, a double, a boolean, an enum, a union with null, and two logical types, uuid and date. The schema is in the header of every file as JSON.