250 MB sample files
A 262,144,000-byte file: about the unzipped size limit of an AWS Lambda function, and larger than the 200 MB request limit of Cloudflare's Business plan. Available in all 54 formats.
Create a 250 MB file
Each file is exactly 262,144,000 bytes and is a valid file of its format. Files this large are not stored anywhere: the button creates the file in your browser. In browsers that can stream to disk (current Chrome, Edge and Firefox on computers and Android) it goes straight into your downloads list and never has to fit in memory; it takes from a few seconds to a few minutes, depending on your device and the format. Other browsers, including Safari and every browser on iPhone and iPad, can only make smaller files, and the buttons say so before you start.
Generated locally in your browser; the output is not uploaded by this tool. Maximum practical size depends on your browser, device memory and available download APIs.
| File | Format | Size | Contents | Create |
|---|---|---|---|---|
| 250 MB Avro samplesample-avro-250mb.avro | Avro | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB BIN samplesample-bin-250mb.bin | BIN | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB BMP samplesample-bmp-250mb.bmp | BMP | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB CSS samplesample-css-250mb.css | CSS | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB CSV samplesample-csv-250mb.csv | CSV | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB DOCX samplesample-docx-250mb.docx | DOCX | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB EML samplesample-eml-250mb.eml | EML | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB EPUB samplesample-epub-250mb.epub | EPUB | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB FLAC samplesample-flac-250mb.flac | FLAC | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB GeoJSON samplesample-geojson-250mb.geojson | GeoJSON | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB GIF samplesample-gif-250mb.gif | GIF | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB glTF samplesample-gltf-250mb.gltf | glTF | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB GPX samplesample-gpx-250mb.gpx | GPX | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB GZ samplesample-gz-250mb.gz | GZ | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB HTML samplesample-html-250mb.html | HTML | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB iCalendar samplesample-ics-250mb.ics | iCalendar | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB ICO samplesample-ico-250mb.ico | ICO | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB INI samplesample-ini-250mb.ini | INI | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB JavaScript samplesample-js-250mb.js | JavaScript | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB JPG samplesample-jpg-250mb.jpg | JPG | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB JSON samplesample-json-250mb.json | JSON | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB JSONL samplesample-jsonl-250mb.jsonl | JSONL | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB KML samplesample-kml-250mb.kml | KML | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB LOG samplesample-log-250mb.log | LOG | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB M4A samplesample-m4a-250mb.m4a | M4A | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB Markdown samplesample-md-250mb.md | Markdown | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB MKV samplesample-mkv-250mb.mkv | MKV | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB MOV samplesample-mov-250mb.mov | MOV | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB MP3 samplesample-mp3-250mb.mp3 | MP3 | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB MP4 samplesample-mp4-250mb.mp4 | MP4 | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB OBJ samplesample-obj-250mb.obj | OBJ | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB ODS samplesample-ods-250mb.ods | ODS | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB ODT samplesample-odt-250mb.odt | ODT | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB PDF samplesample-pdf-250mb.pdf | 250 MB262,144,000 bytes | Created in your browser | ||
| 250 MB PNG samplesample-png-250mb.png | PNG | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB PPTX samplesample-pptx-250mb.pptx | PPTX | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB RTF samplesample-rtf-250mb.rtf | RTF | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB SQL samplesample-sql-250mb.sql | SQL | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB SRT samplesample-srt-250mb.srt | SRT | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB STL samplesample-stl-250mb.stl | STL | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB SVG samplesample-svg-250mb.svg | SVG | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB TAR samplesample-tar-250mb.tar | TAR | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB TIFF samplesample-tiff-250mb.tiff | TIFF | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB TOML samplesample-toml-250mb.toml | TOML | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB TSV samplesample-tsv-250mb.tsv | TSV | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB TXT samplesample-txt-250mb.txt | TXT | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB WAV samplesample-wav-250mb.wav | WAV | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB WebM samplesample-webm-250mb.webm | WebM | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB WebP samplesample-webp-250mb.webp | WebP | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB WebVTT samplesample-vtt-250mb.vtt | WebVTT | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB XLSX samplesample-xlsx-250mb.xlsx | XLSX | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB XML samplesample-xml-250mb.xml | XML | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB YAML samplesample-yaml-250mb.yaml | YAML | 250 MB262,144,000 bytes | Created in your browser | |
| 250 MB ZIP samplesample-zip-250mb.zip | ZIP | 250 MB262,144,000 bytes | Created in your browser |
What is a 250 MB test file?
At 250 MB, files stop fitting through most default upload paths. AWS Lambda limits a function's unzipped deployment package, layers included, to 250 MB, and Cloudflare's Free, Pro and Business plans all reject request bodies this large.
Use it to check that large uploads go directly to object storage, that a server streams the body to disk, and that a browser stays responsive while it sends the file.
In everyday terms: About 25 minutes of CD-quality WAV audio, or a full music album as lossless FLAC.
Limits near 250 MB
Published limits in widely used services that a 250 MB file is useful for testing. Limits change, so confirm them in the current documentation before relying on them.
| System | Limit | At 250 MB |
|---|---|---|
| AWS Lambda | 250 MB unzipped deployment package, including layers | At about the limit. |
| Cloudflare (Business plan) | 200 MB request body | Rejected with HTTP 413. |
| Cloudflare (Free and Pro plans) | 100 MB request body | Rejected with HTTP 413. |
| Slack | 1 GB per file | Accepted. |
Good for
- Streaming uploads to disk or object storage
- Serverless package size checks
- Browser responsiveness during long uploads
- Timeouts on slow connections
Transfer time
How long 262,144,000 bytes take to move, before any compression.
| 1 Mbit/s (slow mobile or uplink) | 34 min 57 s |
|---|---|
| 10 Mbit/s (basic broadband) | 3 min 30 s |
| 100 Mbit/s (fast broadband) | 21 seconds |
| 1 Gbit/s (fibre or data centre) | 2.1 seconds |
Related
250 MB files: questions
- How long does a 250 MB download take?
- About 3.5 minutes at 10 Mbit/s and about 21 seconds at 100 Mbit/s. On a 1 Mbit/s uplink the same upload takes about 35 minutes.
- How many bytes is 250 MB?
- 250 MB is 262,144,000 bytes on this site. Sizes use binary units, in which 1 KB is 1,024 bytes, 1 MB is 1,048,576 bytes and 1 GB is 1,073,741,824 bytes.
- Where does the 250 MB file come from?
- It is created by a script in your own browser and, where the browser supports it, streamed straight to your downloads list, so nothing is stored on or sent from our server. How long it takes depends on your device and the format. Browsers that cannot stream to disk, such as Safari and every browser on iPhone and iPad, can only make smaller files.