Sinsubir

ACTIVE

Convert & edit files 100% in your browser

Launched July 17, 2026

About Sinsubir

Sinsubir is a free, no‑registration suite of file‑conversion and calculation tools that run entirely in the browser, keeping files private and never uploading them to a server. It supports image format conversion, background removal, compression and resizing; a full set of PDF utilities (convert, merge, split, compress, protect, OCR, add watermarks, paginate, convert to Word/Excel); document conversion (Word → PDF); audio‑video processing (extract audio, convert formats, create GIFs, compress videos); QR‑code generation; and Mexican payroll calculators for net salary and severance.

Pricing

Pricing information isn't available yet.

Capabilities

Image format conversion

Convert images between HEIC, JPG, PNG, WebP and AVIF directly in the browser.

Background removal

Automatically erase image backgrounds using AI, with no server upload.

Image compression and resizing

Reduce file size or change dimensions of JPG, PNG or WebP images while preserving aspect ratio.

PDF utilities

Convert to/from PDF (JPG/PNG, Word, Excel), merge, split, compress, add password protection, rotate pages, add watermarks, paginate, and extract text via OCR—all locally.

Document conversion

Transform Word (.docx) files to PDF while retaining formatting.

Audio and video tools

Extract audio from video, convert between common audio formats, create GIFs from videos, and compress MP4 files.

QR‑code generator

Create customizable QR codes for links, text, WhatsApp, etc., downloadable as PNG or SVG.

Mexican payroll calculators

Calculate net salary (including ISR and IMSS) and severance payments instantly in the browser.

Use Cases

Quick photo conversion
Convert iPhone HEIC photos to JPG for sharing or editing without risking privacy.
For: Photographers and everyday users
Marketing material creation
Generate QR codes and remove image backgrounds for promotional graphics directly online.
For: Marketers and content creators
Document preparation for submissions
Merge, compress, and password‑protect PDFs before emailing or uploading to government portals.
For: Office workers and administrators
Developer rapid prototyping
Convert files between formats on the fly during development without installing software.
For: Software developers
Payroll processing in Mexico
Compute net salaries and severance amounts instantly for HR and finance teams.
For: HR professionals and accountants