This script will unpin all files from your Pinata account! You can alter the PIN_QUERY to adjust it if you only want to delete a range of files

unpins.js

const PINATA_JWT = 'Bearer YOUR_JWT_HERE'
const PIN_QUERY = `https://api.pinata.cloud/data/pinList?status=pinned&pageLimit=1000&includeCount=false`
const fetch = require('node-fetch')

const wait = (milliseconds) => {
  return new Promise((resolve) => {
    setTimeout(resolve, milliseconds);
  });
};

const fetchPins = async () => {
  try {
    console.log('Fetching pins...')
    let pinHashes = []
    let pageOffset = 0
    let hasMore = true

    while (hasMore === true) {
      try {
        const response = await fetch(`${PIN_QUERY}&pageOffset=${pageOffset}`, {
          method: 'GET',
          headers: {
            accept: 'application/json',
            Authorization: PINATA_JWT
          }
        })
        const responseData = await response.json()
        const rows = responseData.rows

        if (rows.length === 0) {
          hasMore = false
        }
        const itemsReturned = rows.length
        pinHashes.push(...rows.map(row => row.ipfs_pin_hash))
        pageOffset += itemsReturned
        await wait(300)
      } catch (error) {
        console.log(error)
        break
      }
    }
    console.log('Total pins fetched: ', pinHashes.length)
    return pinHashes
  } catch (error) {
    console.log(error)
  }
}

const deletePins = async () => {
  const pinHashes = await fetchPins()
  const totalPins = pinHashes.length
  let deletedPins = 0
  try {
    for (const hash of pinHashes) {
      try {
        const response = await fetch(`https://api.pinata.cloud/pinning/unpin/${hash}`, {
          method: 'DELETE',
          headers: {
            accept: 'application/json',
            Authorization: PINATA_JWT
          }
        })
        await wait(300)
        deletedPins++
        process.stdout.write(`Deleted ${deletedPins} of ${totalPins} pins\r`)
      } catch (error) {
        console.log(error)
      }
    }
    console.log('Pins deleted')
  } catch (error) {
    console.log(error)
  }
}

deletePins()

Modified version for pinata submarine

`const axios = require('axios');
const PIN_QUERY =
'https://managed.mypinata.cloud/api/v1/content?status=pinned&includesCount=false&pageLimit=1000';

let pinHashes = [];

const PINATA_SUB_KEY = ''; // add your sub api key here

const deletePinFromIPFS = async (hashToUnpin) => {
try {
const res = await axios.delete(https://managed.mypinata.cloud/api/v1/content/${hashToUnpin}, {
headers: {
'x-api-key': PINATA_SUB_KEY,
},
});
console.log('successfully unpinned: ', hashToUnpin);
} catch (error) {
console.log('failed to unpin: ', hashToUnpin);
}
};
const wait = async (time) => {
return new Promise((resolve, reject) => {
setTimeout(() => {
resolve();
}, time);
});
};

const fetchPins = async () => {
try {
const res = await axios.get(PIN_QUERY, {
headers: {
'x-api-key': PINATA_SUB_KEY,
},
});
// console.log(res.data.items);
const responseData = res.data.items;
responseData.forEach((row) => {
pinHashes.push(row.cid);
});
// console.log(pinHashes);
} catch (error) {
console.log('failed to fetch pin');
}
};

const bulkUnpin = async () => {
try {
for (const hash of pinHashes) {
await deletePinFromIPFS(hash);
await wait(200);
}
pinHashes = [];
} catch (error) {
console.log('failed to bulkunpin');
}
};

const main = async () => {
await fetchPins();
while (pinHashes) {
await bulkUnpin();
await fetchPins();
}
};

main();
`