FLAC FrontendH 2.2

FLAC Frontend puts a window around the official FLAC encoder, so turning WAV files into lossless FLAC is a matter of dragging them in and clicking Encode.

It is free, it is tiny at around 400KB, and it runs from a folder with nothing to install.

Get FLAC Frontend-H 2.2 free - 64-bit or 32-bit, both portable.

What FLAC Frontend Actually Does

The FLAC encoder itself is a command-line program. You type a long line of text, press Enter, and hope you got the switches right.

FLAC Frontend is the window that types that line for you. You drop files in, pick a compression level, choose where the results go, and it builds and runs the command in the background.

If that split is new to you, our guide to graphical and command-line tools explains why so much free media software works this way.

Which Download You Actually Want

The links page carries three different programs, which is confusing until you know what separates them. Two are frozen; one is still being worked on.

Frontend-H comes as a .7z archive rather than an installer, so extract it anywhere and run the executable. There is no setup step, no registry entry and no admin rights needed.

It needs Windows XP or later and the .NET Framework 2.0 or later, which is a genuinely low bar - this still runs on machines nothing else will.

What It Can Convert

You can drag WAV, FLAC, OGG and OGA files straight onto the window. Encoding produces FLAC; decoding turns FLAC back into WAV.

The encoder underneath is FLAC 1.5.0, the current reference release, which also reads AIFF and the big-file WAV variants W64 and RF64. Swapping in your own build is a matter of dropping flac.exe and metaflac.exe into the tools folder.

Beyond straight conversion it will test files for corruption, generate MD5 fingerprints, re-encode at a different compression level, and embed a CUE sheet.

The Settings Worth Changing

• Compression level. The scale runs 0 to 8 and none of it is a quality setting - every level is lossless, so the choice is only file size against encoding time, and the default 5 is the sensible stop.
• Multithreading. Frontend-H exposes the threading added in FLAC 1.5.0, which is the biggest speed change the encoder has had in years - turn it on for anything longer than a single track.
• ReplayGain. This measures how loud each file is and writes the figure into the tags, so your player evens out the volume between albums without touching the audio.
• Verify after encoding. It decodes each finished file and checks it against the original - slower, and worth it whenever the source is about to be deleted.

One option deserves a second look before you tick it. Delete input files after encoding does exactly what it says, and there is no undo.

What Changed in Build 20260913

The 13 September 2026 build adds one thing: you can now set the priority that flac.exe and metaflac.exe run at, under Preferences, then Process priority.

The choices are Idle, BelowNormal, Normal, AboveNormal and High, and the setting is remembered between launches. RealTime is deliberately absent because it needs admin rights and can make a machine unresponsive.

Set it to BelowNormal and a long batch job will encode away quietly while you keep working. The practical use is a big overnight conversion that you do not want fighting your PC for attention.

The build before this one, from November 2025, carried the more important fix: WAV files are now skipped during Decode, which stops flac.exe deleting a source file it was never meant to touch. The same build made the update checker re-offer a version you had previously dismissed, by unticking and re-ticking Check for updates on startup.

Every release note sits on the FLAC Frontend-H releases page.

Who Should Look Elsewhere

The tell is simple: if the files you want to convert are MP3s or AACs, this is the wrong tool. FLAC Frontend feeds the FLAC encoder, and the FLAC encoder does not read lossy formats.

Converting an MP3 to FLAC also gains you nothing. The detail was thrown away when the MP3 was made and no lossless format brings it back, so you end up with a bigger file holding the same sound.

If you need a converter that takes anything and produces anything, X FLAC Encoder covers MP3, AAC, Opus and ALAC alongside WAV, with parallel batch processing and the same ReplayGain and CUE sheet handling. For a one-off file with nothing to install at all, our browser-based audio converter handles it in a tab.

Other FLAC and Audio Conversion Tools

Several tools on the site take a different route to the same result.

• X FLAC Encoder - converts 20-plus formats into FLAC, with parallel batches.
• Exact Audio Copy - bit-perfect CD ripping with error correction, for archiving discs.
• CDex - rips audio CDs straight to FLAC, MP3 or OGG in one step.
• fre:ac - a multi-format converter covering MP3, MP4, OGG and FLAC.
• MediaHuman Audio Converter - batch conversion between FLAC, MP3, AAC and a dozen more.
• foobar2000 Free Encoder Pack - turns foobar2000 into a full converter.
• LameXP and winLAME - MP3-first front-ends that write FLAC too.
• Helium Audio Converter - batch conversion across MP3, FLAC, WAV and AAC.
• Everything else lives in our audio encoders section.

If your source is a CD rather than a file, the CD ripping and encoding guide walks through the whole process step by step.

Quick questions

Download FLAC Frontend-H 2.2 and see how it handles your files, or tell us how you got on if you have used it before.