ForHosting KIT · Developer Utilities

Trim blank lines top and bottom

Pasted snippets and exported documents often arrive with a halo of empty lines at the top and bottom that no reader asked for.

● BetaFree · in your browser

Run — free How it works & API

Use it from WebAPIEmailTelegramApp soon

This tool removes those edge blank lines and nothing else: interior paragraphs, the extra space you left between sections, and the padding on a content line all stay exactly as they were. Send any string—an email draft, a Markdown file, a log dump, or a homework essay—and the engine normalizes Windows and old Mac line endings, walks inward from both ends until it finds a line that still has visible text, and returns the remaining block. Whitespace-only lines count as blank, so a row of spaces or a lone tab at the start of a paste is dropped just like a truly empty line. The path is a deterministic parse with no network, no clock, and no randomness, so the free browser runner and the API return the same JSON every time.

How to use it

Enter your values in the form above. The tool checks them before calculating and shows the result on the same page.

Check your inputs

Use the labels and units shown next to each field. If something is missing or outside the allowed range, the page points to the field to fix.

Use it again or automate it

Use the browser tool for individual checks and the API when you need the same capability in an automated workflow.

What you can do with it

Get an answer now

Enter one set of values and see the result without building a spreadsheet or script.

Compare scenarios

Change one value at a time and rerun the calculation to understand what affects the result.

Automate repeated work

Use the API when the same calculation needs to run inside your product or workflow.

FAQ

How do I use this capability?

Complete the fields above and run it on this page. The form highlights anything that needs attention.

For developers — API access

Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.

API endpoint

POSThttps://api.kit.forhosting.com/str/trim-blank-edges

Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.

Call it from your stack

curl -X POST https://api.kit.forhosting.com/str/trim-blank-edges \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"\n\n  Hello world  \n\nKeep  this  spacing\n\n"}'

const res = await fetch("https://api.kit.forhosting.com/str/trim-blank-edges", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "text": "\n\n  Hello world  \n\nKeep  this  spacing\n\n"
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/str/trim-blank-edges",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "text": "\n\n  Hello world  \n\nKeep  this  spacing\n\n"
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/str/trim-blank-edges", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => '{"text":"\\n\\n  Hello world  \\n\\nKeep  this  spacing\\n\\n"}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"text":"\n\n  Hello world  \n\nKeep  this  spacing\n\n"}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/str/trim-blank-edges", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)

Example request

{
  "text": "\n\n  Hello world  \n\nKeep  this  spacing\n\n"
}

Example response

{
  "task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
  "type": "str.trim_blank_edges",
  "status": "queued",
  "_links": {
    "result": "/tasks/tsk_…/result"
  }
}

The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.

Pricing

Per request$0.002

Published price — no tokens, no invented credits. A failed task is never charged.

Limits

max_chars 100000

Errors

HTTP	Code	Meaning
`401`	`unauthorized`	Missing or invalid API key.
`402`	`insufficient_balance`	Your balance doesn't cover the task price.
`404`	`unknown_type`	That task type doesn't exist.
`429`	`rate_limited`	Too many requests. Use the webhook instead of polling.

Read the full KIT documentation →