Best Batch File Converter 2026: 6 Tools Tested

What is a batch file converter?

A batch file converter — also called a bulk converter or batch converter tool — is software that converts multiple files at once instead of one at a time. You load a folder or hundreds of files, apply a conversion recipe once (for example: resize to 1200px, add a watermark, convert to WebP), and the tool processes the entire batch automatically.

A converter earns the “batch” label when it can finish a folder unattended — not when it merely lets you open more than one file. That is the line between a real batch converter and a single-file converter with a queue window bolted on.

What is batch conversion?

Batch conversion means converting many files with one set of settings instead of repeating the same job file by file. You point the tool at a folder, define the output once, and it processes every file in the run. Bulk conversion, mass file conversion, and batch conversion all describe the same process.

A “bulk converter” and a “mass file converter” are the same thing as a batch converter tool — the wording changes, the job does not. Advanced batch converters go one step further with operation chaining: conditional rules, several steps per file, and saved recipes you can run again next month.

Which top converters handle batch processing?

All six tools here handle batch processing — they differ in how much of the job they automate. XnConvert and IrfanView stack operations over image folders. HandBrake and Shutter Encoder run a queue of files. FFmpeg executes scripted pipelines. Formatif Pro chains several operations into one saved workflow.

• XnConvert — stacks up to 80 image operations in a folder-in, folder-out run.
• IrfanView — a batch dialog that converts and renames images in one pass.
• HandBrake — a video queue with per-file presets and GPU encoding.
• Shutter Encoder — an FFmpeg-powered queue for video, audio, and images.
• FFmpeg — scripted shell or PowerShell loops with no file-count limit.
• Formatif Pro — a visual workflow builder that chains steps and saves recipes.

For video specifically, the tools that batch multiple formats most effectively are FFmpeg, HandBrake, Shutter Encoder, and Formatif Pro. If your batch mixes video, audio, and images in one pass, only FFmpeg, Shutter Encoder, and Formatif Pro cover all three.

Two kinds of batch conversion — and why the difference matters

Most tools that claim “batch support” mean a queue: you load files one at a time, assign an operation, and the app processes them sequentially. That saves you from watching a progress bar for each file, but you still configure every file manually.

A true batch workflow builder is different. You define a recipe once — say, “resize to 1200px, add a watermark, convert to WebP, compress with specific settings” — and the tool applies every step to every file in a folder automatically. No per-file configuration. No clicking through dialogs 300 times.

The tools below span both approaches. Choose based on whether you need a queue or a repeatable production pipeline.

How to batch convert files in 4 steps

To convert multiple files at once, the process is the same regardless of which batch converter tool you pick:

1. Gather the files. Put everything in one folder, or load the files directly into the tool's queue.
2. Choose the output once. Pick the target format and settings a single time — for example, WebP at 80% quality, or MP4 H.264 at 1080p.
3. Add repeat operations. If your job needs more than conversion (resize, watermark, compress, rename), stack them now so they run on every file.
4. Run the batch.Start the job and let the tool process every file automatically. Save the recipe if your tool supports it so next month's batch is one click.

The recipe holds whether you use a free batch file converter or a paid workflow builder: gather the files, define the output once, stack the operations that repeat, then run. If your batch is video and you would rather skip the queue entirely, script it instead.

How to write a batch video conversion script with FFmpeg

A batch video conversion script loops one FFmpeg command over every file in a folder, so nothing has to be added to a queue by hand. Two decisions shape the script: copy the streams untouched (fast and lossless, but the codec cannot change) or re-encode (slower, but it can change codec, resolution, or bitrate). Copy for container swaps, re-encode for everything else.

Windows: PowerShell batch loop

This remuxes every .mkv in the current folder to .mp4 without re-encoding, so a two-hour file finishes in seconds instead of minutes.

# Remux every .mkv in this folder to .mp4 (no re-encode)
Get-ChildItem -Filter *.mkv | ForEach-Object {
  $out = Join-Path $_.DirectoryName ($_.BaseName + ".mp4")
  ffmpeg -i $_.FullName -c copy $out
}

Windows: classic .bat loop

If you prefer a batch file, save this as convert-mov.cmd next to your footage and double-click it. FFmpeg must be on your PATH.

@echo off
for %%f in (*.mov) do ffmpeg -i "%%f" -c:v libx264 -crf 20 -preset medium "%%~nf.mp4"

macOS and Linux: bash loop

This one re-encodes every MOV to H.264 at CRF 20 — a good size-to-quality default — and writes the results into a converted/ folder so your originals stay untouched.

#!/usr/bin/env bash
set -euo pipefail
mkdir -p converted
for f in *.mov; do
  ffmpeg -i "$f" -c:v libx264 -crf 20 -preset medium "converted/${f%.mov}.mp4"
done

Remux or re-encode? Pick the right batch script

Match the flag to the job. Remuxing is the fastest batch job FFmpeg can run because no frames are decoded; re-encoding is the only way to change the codec itself.

Spot-check two or three outputs before deleting originals — mixdowns and subtitle streams are the usual casualties of a container swap. For container-specific steps, see our walkthroughs on converting MKV to MP4 and batch-converting video to any format.