converter.now
Save files
THE FILE KNOWLEDGE DESK

File Format & Conversion Guides

Independent guides for formats that move between cameras, apps, teams, archives, and the open web.

ISSUE 01JULY 202624 FIELD GUIDES
Abstract editorial view of many file formatsKnow the container

The field guide to file formats

A format is a set of tradeoffs, not a three-letter label. Learn to choose one by what must survive the trip.

8 MIN READ · UPDATED 2026-07-31
FROM THE DESK

Compatibility is not the same as quality.

A file can open successfully and still lose transparency, structure, color intent, metadata, or future editability. This magazine focuses on those quieter consequences.

File Formats

What a file extension really tells you

10 min read

File Formats

Containers vs. codecs: the difference that fixes conversion confusion

11 min read

File Formats

Archival formats and delivery formats serve different jobs

10 min read

Browse the desk

Six connected fields of knowledge

01Know the container

File Formats

Field guides to the formats behind everyday work: what they store, where they fail, and which replacement makes sense.

4 guides →02Pixels, vectors, color

Images & Graphics

Practical image decisions for publishing, photography, design systems, accessibility, and long-term archives.

4 guides →03Codecs without the fog

Video & Audio

Clear explanations of containers, codecs, bitrates, channels, frame rates, and playback compatibility.

4 guides →04Documents that travel well

PDF & Documents

How to preserve layout, make files searchable, control permissions, and move between office formats safely.

4 guides →05Smaller, not worse

Compression & Quality

A working understanding of lossless and lossy compression, quality metrics, and delivery budgets.

4 guides →06Files are data

Privacy & Workflows

Safer upload habits, retention decisions, batch workflows, metadata hygiene, and durable file organization.

4 guides →
A quick route through the desk

Choose a guide with three questions

Start with the file you have, identify what the destination must preserve, and then choose the quality or privacy check that can prove the result is ready.

  1. 01What is inside the source? Check the container, codec, pages, pixels, metadata, or editable structure.
  2. 02What must the output keep? Name the required compatibility, layout, transparency, quality, or playback behavior.
  3. 03How will you verify it? Open the derivative in its destination and compare the feature most likely to change.
Use the six topic collections above as a decision path, not as isolated articles.
The full index

Latest field guides

VOL. 1 / NO. 1
Images & GraphicsJP
Pixels, vectors, color

JPG, PNG, WebP, and AVIF compared

The right web image format depends on transparency, detail, browser support, and how aggressively the image must load.

10 min read →
Images & GraphicsRA
Pixels, vectors, color

Raster vs. vector: choose by how the artwork must scale

Pixels describe samples; vectors describe shapes. The correct choice follows the content, not a design trend.

7 min read →
Images & GraphicsRE
Pixels, vectors, color

Resolution, PPI, and DPI without the myths

Pixel dimensions determine digital detail; print density determines how tightly those pixels are placed on paper.

9 min read →
Images & GraphicsWH
Pixels, vectors, color

Why color changes after image conversion

A missing or mishandled ICC profile can shift color even when every pixel value survives.

7 min read →
Video & AudioTH
Codecs without the fog

The practical guide to video codecs for the web

A dependable web video balances reach, quality, decoding cost, and file weight.

9 min read →
Video & AudioBI
Codecs without the fog

Bitrate, resolution, and frame rate: which lever matters?

These controls interact. Reduce the one your content can spare rather than applying the same preset to every clip.

9 min read →
Video & AudioLO
Codecs without the fog

Lossless vs. lossy audio for music, speech, and archives

FLAC, WAV, AAC, and MP3 solve different storage and delivery problems.

8 min read →
Video & AudioSA
Codecs without the fog

Sample rate and bit depth: useful numbers, sensible limits

Higher settings can help production headroom, but they do not automatically improve a finished listening copy.

10 min read →
PDF & DocumentsHO
Documents that travel well

How to compress a PDF without making it unreadable

Most oversized PDFs are really oversized image collections with text wrapped around them.

7 min read →
PDF & DocumentsOC
Documents that travel well

OCR and searchable PDFs: what conversion can recover

OCR adds a text interpretation layer to page images; it does not recreate the original document structure perfectly.

9 min read →
PDF & DocumentsPD
Documents that travel well

PDF to Word: what converts cleanly and what does not

PDF stores final placement; Word stores editable flow. Conversion has to infer a structure the PDF may never have recorded.

9 min read →
PDF & DocumentsPR
Documents that travel well

Protect, redact, or flatten? Three very different PDF actions

Passwords, redaction, and flattening address access, disclosure, and editability - Not the same security problem.

8 min read →
Compression & QualityLO
Smaller, not worse

Lossy vs. lossless compression in plain English

Lossless coding removes repetition; lossy coding also removes information judged less important to perception.

9 min read →
Compression & QualityHO
Smaller, not worse

How to choose an image quality setting

A quality slider is not a percentage of retained information and is not standardized across encoders.

10 min read →
Compression & QualityA
Smaller, not worse

A practical file-size budget for faster websites

Performance improves when each asset has a budget before design and export decisions become fixed.

10 min read →
Compression & QualityPS
Smaller, not worse

PSNR, SSIM, and VMAF: what quality scores miss

Metrics help compare encodes, but no single score understands every texture, viewing condition, or business need.

8 min read →
Privacy & WorkflowsA
Files are data

A privacy checklist for online file conversion

The right converter is not only the one that produces the right bytes; it must handle the source responsibly.

8 min read →
Privacy & WorkflowsWH
Files are data

When - And when not - To remove file metadata

Metadata can reveal location, device details, authors, revision history, and timestamps, but it can also provide valuable provenance.

7 min read →
Privacy & WorkflowsA
Files are data

A dependable batch-conversion workflow

Automation saves time only when inputs, naming, validation, and rollback are designed together.

10 min read →
Privacy & WorkflowsHO
Files are data

How to name and organize converted files

Predictable names make derivatives auditable and prevent the familiar final-final-v2 problem.

7 min read →