Online Ruler vs Bulk File Rename

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Online Ruler compared with Bulk File Rename
Detail	Online Ruler	Bulk File Rename
What it does	Measure anything on your screen with pixel-perfect accuracy	Free online tool to rename multiple files at once with live preview, no upload or installation required
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Smart Auto-Detect identifies your device from a database of 100+ profiles Three calibration methods: auto-detect, screen diagonal, and credit card Place rulers on any edge of the screen in any combination Click-to-measure distances in any direction Live cursor position tracking Dark mode with automatic system preference detection Support for four measurement units: cm, mm, inches, and pixels	Live preview of all changes before download Automatic numbering that continues sequentially Smart find and replace with regex support Text case formatting in one click Duplicate name warnings before download Works on entire folders including subfolders Processes files locally in browser, no uploads Real image format conversion Rename from list using CSV or text files
What makes it different	No installation required—runs entirely in your web browser Achieves near pixel-perfect accuracy typically within 0.5mm for well-calibrated screens Completely free with no ads, account, or limitations Calibration saved locally so no need to recalibrate on each visit Works on tablets and mobile devices with touchscreen support	Runs entirely in browser with no installation, accounts, or file uploads required Works on any device including phones and locked-down computers Live before-and-after preview with collision detection Open-source code available for inspection
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	4 +3 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	17	12
Referring domains (Majestic)	4	2

4 details filled in for both companies.

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