New: Bring your own s3 bucket to store the generated files

JSON to .xlsx/.csv API

Tired of Building export features from Scratch?
SheetFast API Transform Complex JSON to XLSX/CSV in Seconds. No Dependencies.

Try to convert JSON to XLSX/CSV in seconds

Paste a JSON array and click on "Convert" to generate the XLSX and CSV files.

  • Default

  • BlueWave

  • GreenMatrix

  • OldSchoolTable

  • RawLimeJuice

POST api.sheetfast.com/generate HTTP/1.1
Authorization: Bearer XXXX
Content-Type: application/json
{
  "sheets": [{
    "name": "First sheet",
    "rows": [{
      "date": "2024-06-19T21:59:13.387Z",
      "user": "vyril",
      "tags": ["dev", "cto"]
    },
    {
      "date": "2024-07-29T11:32:27.177Z",
      "user": "naughty",
      "tags": ["ceo"]
    }]}, {
    "name": "second sheet",
    "rows": [{
      "date": "2024-06-19T21:59:13.387Z",
      "user": "vyril",
      "tags": ["dev", "cto"]
    },
    {
      "date": "2024-07-29T11:32:27.177Z",
      "user": "naughty",
      "tags": ["ceo"]
    }]}],
  "options": {
    "formatters": {
      "date": "date::%Y-%m-%d"
    }
  }
}

Engineered for Developers

Simple, robust API. Handles complex JSON structures. Scales for massive datasets.

Set custom file expiration.

Zero Dependencies

From setup to first file in 5 minutes flat.

Data Security

Your data, your rules. You can use your own bucket.

Feature Multi-sheet support

Multi-sheet support

Generate multiple sheets in one go.
CSV : Get individual files, neatly zipped.
XLSX : One file, multiple sheets, zero hassle.

Format with Precision

Customize dates, numbers, currencies, and more

Unlimited Scalability

Grow your exports seamlessly as your data expands.

Feature Custom design

Excel Sheets That Wow Your Clients

Create custom templates with your branding. Share project ID with your dev team. Watch it come alive.

Your brand, your sheets

Every sheet aligns perfectly with your identity.

It Just Works

Automate complex export processes effortlessly

Frequently asked questions

Do you have any questions? We have got you covered.