The Ultimate SMS
Customer Toolkit

SLD Technologies — Precision tools for character counting, number formatting, and campaign optimization for Sri Lankan enterprises.

SLD SMS Dashboard Dialog ESMS Login

Character Counter

Standard GSM

0 Chars

0 SMS Parts

GSM 7-Bit Encoding

Mask Validator

Check your Sender ID (Max 11 Alphanumeric characters).

Length: 0/11

Valid Format

SLD SMS API Doc

Dialog API Doc

Power Tools

Advanced utilities to clean and optimize your bulk campaigns.

Input Numbers

Formatted (947XXXXXXXXX)

Paste Content to Remove Duplicates

Template Creator

Variable: {name}

Variable: {day}

Message Template

Mobile Preview

Retail Sales

Fri: 4PM - 8PM
Payday weekends

Food/Promo

Daily: 11AM - 1PM
Evenings: 5PM - 7PM

Education

Sunday: 7PM - 9PM
Monday mornings

Bank/OTP

Instant (24/7)
Zero Delay Priority

Unicode Input (Sinhala / Tamil / Accents)

GSM Optimized (Latin / Phonetical)

Converts Sinhala to Singlish, Tamil to Tanglish, and strips accents. Ensures 160-character billing by removing all Unicode data.

Frequently Asked Questions

If your message contains Unicode characters (Sinhala, Tamil, or Emojis), the system uses UCS-2 encoding. Standard GSM allows 160 characters, but Unicode messages are limited to 70 characters per SMS part.

To register a Sender ID (Mask) in Sri Lanka, you need a Business Registration (BR) copy and a request letter on company letterhead. Approval from TRCSL and local operators takes 3-5 working days.

Direct Gateway Access

The Ultimate SMS Customer Toolkit