Initializing, please wait a moment

Site Map

Last rebuilt 2026-05-15. This page regenerates on every deploy from the live route registry, so the lists below match what is actually shipping today.

Use this page when you know what you need but cannot remember the exact tool name. Tools are grouped by category; long-form guides are grouped by topic. Every link below is a canonical URL - no redirect aliases. For the machine-readable index Google and other crawlers consume, see sitemap.xml.

Tools by category

The 0 tools on the site are grouped into eight categories. Each category links to a hub page that explains the trade-offs between the tools in it; every tool below the hub is the canonical URL for that tool.

Guides by topic

114 long-form guides covering decision trade-offs, step-by-step workflows, and editorial case studies. Browse the full topical hub at All Guides; the lists below are an exhaustive index for fast lookup.

ZIP and file compression (21)

Compress a Folder for Email - Compress a folder for email in under a minute.
Compress ZIP: When ZIP Compression Saves Space (and When It Does Not) - A short reader-task guide to compressing files into ZIP: when ZIP compression actually saves space, when it does not, and where the in-browser ZIP creator live...
File Compressor Online: ZIP a Folder vs Compress an Image - Routing guide for the file-compressor question: when to ZIP a folder for transport vs when to compress a single image for bytesize.
File Compressor vs ZIP - "File compressor" is too generic.
File Compressor: Pick by File Type - Free file compressor that picks the right browser tool by what you have: ZIP a folder, compress photos, convert HEIC, bundle PDFs, or use a transfer link.
How to Compress a File Online (Step by Step) - Compress a single file online without uploading.
How to compress a folder - Compress an entire folder into a single ZIP in your browser.
How to Compress a Zip to a Smaller Size - Compress an existing zip again, the right way: when re-zipping helps, when it does nothing, and the in-browser tool to use without uploading the archive.
How to compress a ZIP to a specific size (2 / 25 MB, 100 KB) - Hitting an exact ZIP size (2 MB, 25 MB email cap, 100 KB form cap) is not deterministic.
How to Extract a File Online - ZIP, RAR, 7z (which route on this site does what) - If you searched "extract file online" or "file zipper", this is the routing rule.
How to Make a Zip File Smaller - Make a zip smaller without losing files: pick the right compression level, drop pre-compressed media first, split if it must clear an email size cap.
How to Reduce Zip File Size Online (Free) - Reduce zip file size online and free.
How to Zip a Folder Online, Step by Step - Zip a folder online in five steps: pick the folder, keep the structure, set compression, name the output, download.
How to Zip Multiple Files Into One - Zip several files into a single archive in your browser: select, name the output, choose a compression level, and download.
Online Zip vs 7z vs Rar - Which to Pick - Pick the right archive format online: zip for compatibility, 7z for best compression, rar when you must open one.
Recover a Corrupt Zip File - Options - Practical paths for a zip that will not open: re-download, partial extract, repair tools, and when to give up.
What Is a File Compressor and Which to Use - A "file compressor" is not one tool.
Zip Compressor: Compress Files Into a Smaller ZIP Archive - A short reader-task guide to using a zip compressor: when to pick zip compression for a folder of files, what the resulting .zip archive does and does not pres...
Zip File Converter - What It Actually Does - "Zip file converter" is the wrong search.
ZIP password types - strong vs weak, explained (when an online remover can help) - Before you upload a password-protected ZIP to https://freetoolonline.com/zip-tools/remove-zip-password.html, check the encryption type.
Zip vs Zipx vs Rar vs 7z, Explained - Four archive formats compared: which Windows opens by default, which compresses smallest, and which is worth a separate app.

HEIC and image conversion (15)

Compress JPEG Without Losing Quality: Quality vs Size - Pick the right JPEG quality setting: when 75 looks identical to the original, when 95 wastes bytes, and when AI auto-compression beats both.
Compress vs Convert an Image - Compress or convert an image?
Convert 100 HEIC Photos to JPG - How to convert 100+ HEIC photos to JPG in-browser without upload.
HEIC to JPG: what the converter actually does - How https://freetoolonline.com/image-converter-tools/heic-to-jpg.html actually works: libheif decode, JPG re-encode, EXIF + quality controls, plus the claims the tool does NOT make.
HEIC vs JPG Converter - When to convert HEIC to JPG, when to keep the HEIC original, and when neither path wins.
HEIC vs JPG vs WebP - iPhone photos are HEIC; Windows and Android expect JPG.
How to Convert an iPhone Photo to JPG - Convert an iPhone photo from HEIC to JPG without iCloud, an installed app, or a desktop.
How to Convert HEIC to JPG Step by Step - Convert HEIC to JPG step by step.
iPhone Photo Format Explained - iPhone photos can be HEIC, JPG, PNG, or RAW.
JPG vs JPEG - Are They the Same? - JPG and JPEG are the same image format.
JPG vs PNG for the Web - JPG vs PNG for web images - when lossy compression wins, when lossless + transparency matters, and how WebP changes the calculus in 2026.
PDF vs HEIC for Archival - PDF vs HEIC for document archival - which preserves receipts, IDs, and forms long-term.
PNG vs SVG - When to Use Each - PNG vs SVG - raster vs vector, when to pick each for logos, icons, UI, and photos, with exact conversion paths and performance tradeoffs.
SVG to PNG - When to Rasterize - Most SVGs should stay vector.
Why HEIC Won't Open on Windows - Three Quick Fixes - When Windows says it can't open a .heic file, three quick fixes work: install the free HEIF photo extension, use a free viewer, or convert to JPG online.

Image editing and graphics (11)

Extract Frames from a GIF - How to extract frames from a GIF for a social post - pick a hero still, preserve transparency, and ship a static image that loads fast.
Extract GIF Frames: PNG or JPG, Which Format Should You Pick? - PNG or JPG when extracting GIF frames?
Gif Frame Extractor — pull individual frames from any animated GIF - Step-by-step guide on extracting frames from any animated GIF: pick PNG or JPG output, set FPS, and download every frame as its own image.
GIF Frame Extractor Output Looks Wrong? Three Causes & a 30-Sec Test - GIF frame extractor gave one frame, blank frames, or weird colors?
GIF Frames vs GIF Frame Rate (FPS): Which One Do You Actually Need? - GIF frames are the still pictures inside an animated GIF; GIF frame rate (FPS) is how fast they play.
How to Crop and Rotate an Image - Crop and rotate an image in the browser without losing the original.
How to Split a GIF Into Frames - Pull individual frames out of an animated GIF for editing, archiving, or social posts.
Photo Editor vs Graphics App vs Batch - Three image-tool categories solve three different problems.
QR Code Content Types: URL, vCard, Wi-Fi, Text - Which to Pick - First QR code?
QR code error correction and scan failures: why your QR will not scan - If a QR code will not scan, the cause is usually one of four things: payload size, error-correction level, contrast, or print scale.
QR Code Generator - Best Practices - A QR code that always scans is a small set of choices: error correction, contrast, size, payload.

PDF (5)

How to flatten a PDF - and when to do it - Flattening a PDF bakes form fields, annotations, and signatures into static page graphics.
How to Sign a PDF After Removing Its Password - How to sign a PDF after removing its owner password - legit workflow for contracts and forms, with legal and privacy notes.
PDF Editing Ladder - Pick the Right PDF Tool - PDF editing decision ladder.
PDF Password - Owner vs User - PDF password types - owner vs user password, what each blocks, when to set each, how to choose passwords that actually protect the document.
PDF preflight online: what it actually checks (and what it does not) - Online PDF preflight checks PDF/A archival conformance - it does not fix issues, certify PDF/X print, or repair corrupt PDFs.

Video (5)

FFmpeg Online Conversion Stalled? Three Fixes (and a 30-Second Test) - Online FFmpeg conversion stuck?
FFmpeg Online vs Local FFmpeg - When Each Wins - FFmpeg online (browser wasm) vs local FFmpeg CLI - size limits, privacy, speed, and codec coverage.
FFmpeg Online vs Video Converter - Which Tool to Open - Routing guide for the "ffmpeg online" task: when to open FFmpeg Online and when the format-specific Video Converter or GIF Maker route is faster.
MP4 vs MOV vs MKV - Which Container When - Three video containers compared.
MP4 vs WebM for the Web - MP4 plays in every browser; WebM is 20-30 percent smaller in modern ones.

Device tests (18)

Camera test vs webcam test vs camera quality - which one? - Three names, three different checks.
Check Webcam and Mic Before Interview - Check webcam and microphone before an interview - 5-minute browser test for camera, mic levels, lighting, and lag.
Dead Pixel Testing Guide - Dead pixel testing guide - dead vs stuck vs hot pixels, full-screen color checks, recovery steps, and when a monitor warranty replacement is justified.
Device Test Checklist for Remote Work (2026) - Run the 8-point device test checklist before your next remote meeting.
How to Check Camera Quality on Your Phone - A two-minute browser test for phone camera quality: resolution, focus, low-light, dust on the lens.
Keyboard Tester - Rollover vs Anti-Ghost - N-key rollover and anti-ghosting are different keyboard features.
Lcd Test — lcd test guide - Lcd Test guide: how to lcd test online, free in your browser.
LCD test vs display test vs monitor test - which one? - Three names, three different checks.
LED Test vs LCD Test: Which Applies to Your Screen? - LED is the backlight; LCD is the panel.
Microphone Test Levels: What Quiet, Normal, and Peak Mean - Read a browser microphone test level meter in plain English: what quiet looks like, what normal call-ready audio is, and when peaks mean clipping.
Microphone Test No Sound: 4 Fixes That Work - Microphone test shows no sound or a flat waveform?
Microphone Test Online - What It Checks - A browser microphone test confirms the mic is selected, captures sound, and matches your expected volume.
Microphone Test Permission Blocked: How to Allow Mic Access in Your Browser - Microphone test shows a flat meter or no permission prompt?
OLED Test vs LCD Test: What Changes on an OLED Panel - OLED panels need a different test than LCD: no backlight bleed to look for, but burn-in and image retention matter.
Test Dead Pixels Before Returning a Monitor - How to test for dead pixels before returning a monitor - full-screen color check, stuck vs dead pixels, warranty proof, and what manufacturers accept.
Test LCD: Pick the Right Screen-Test Tool - Test LCD, LCD test, or LCD tester all map to one job: check your screen for dead pixels, color, and backlight in your browser.
What an LCD test actually checks - An LCD test scans for dead pixels, stuck pixels, color uniformity, and burn-in.
What an LCD Test Does (and When to Run One) - What an LCD test actually checks (dead pixels, stuck pixels, backlight bleed, banding) - and when running one is the right move before keeping a screen.

Developer and encoding (15)

Base64 - When to Use and When Not To - Base64 makes binary data text-safe at a 33 percent size cost.
CSS Minifier vs Compressor - CSS minifier vs compressor - whitespace removal vs gzip/brotli compression, what each saves, and the exact pipeline order for production delivery.
CSS Minifier vs Uglifier vs Tree-Shaking - Three size-reduction tactics for one goal.
CSV vs JSON - When to Use Each Data Format - CSV vs JSON data formats - when to pick rows-and-columns vs structured objects, with parsing, size, and tooling tradeoffs for 2026 workflows.
Image to Base64 - Embed in HTML/CSS vs Link the Image File - Should you embed an image as a base64 data URL in HTML/CSS, or link the image file?
JSON parser online: validate vs format vs tree view - which feature do you need? - Validate, format, or explore JSON?
JSON vs YAML vs TOML, Explained - Three config formats, three ergonomics.
MD5 Alternatives: bcrypt, Argon2id, SHA-256 - MD5 is wrong for passwords and adversarial integrity.
MD5 to text - why you cannot convert it back (and what to do) - A 32-character MD5 string is a one-way fingerprint - it cannot be converted back to the text that produced it.
MD5 vs SHA-256 - When to Hash - MD5 vs SHA-256 - speed, collision resistance, and concrete use cases.
Minify CSS and JS for Cold Start - Minify CSS and JS to cut Cloud Run cold-start and Cloudflare Workers bundle size.
Read and compare MD5 hashes correctly: case, whitespace, hex format - Two MD5 hashes match when their 32 hex characters agree after lowercasing and trimming whitespace.
Text vs Line vs Word vs Git Diff - Four kinds of diff answer different questions.
Unix Timestamps Explained - Unix timestamps explained - seconds vs milliseconds, ISO-8601, RFC 2822, UTC vs local time, and the common pitfalls when converting between formats.
Why MD5 Cannot Be Decrypted - MD5 is a one-way hash, not encryption, so there is no decrypt key.

Editorial and other (24)

Before a video call - which tools to run (screen, camera, microphone) - Five minutes before a video call: a quick checklist of which checks to run on your screen, your webcam, and your microphone, in priority order, with the right...
Camera Test Black Screen: 4 Fixes That Work - Camera test shows a black rectangle?
Camera Test Permission Blocked: How to Allow Camera Access in Your Browser - Camera test shows nothing or asks no permission prompt?
Compressed JPG Looks Blurry? Three Causes (and Quick Fixes) - JPG looks blurry after compression?
CSS Unminifier vs Prettier: When to Use Each (Read Shipped CSS or Format Source) - When CSS Unminifier is the right tool to read shipped CSS quickly, when Prettier is the right tool to format source you will commit, and what neither can recov...
Download Link Not Appearing After Conversion - 5 Fixes - The upload finished but the download link never showed up?
EXIF Metadata and Image Compression: What Gets Stripped - Compressing an image often strips EXIF metadata - GPS, camera, timestamp.
Free Online Tools - No Upload Required - How browser-based tools convert, compress, and edit files without ever uploading them.
How to choose a compression level - quality vs file size, with examples - Pick the right compression level on https://freetoolonline.com/image-tools/compress-image.html - 50, 70, 85, or 100.
How to Compress a JPG for Email Attachment Size Limits - Pick the right JPG quality to land photos under Gmail's 25 MB / Outlook 20 MB / corporate 10 MB email caps without the photo turning to mush.
How to tell if a JPG was compressed too much - Read the saved-with quality value of an existing JPG, recognise visible artifacts of over-compression, and decide whether re-encoding will help or hurt.
How to Test a Keyboard Online Step by Step - A 60-second browser keyboard test: open the page, press each key, watch each one highlight.
How to Test a Touchscreen for Bad Spots - A 60-second browser-only check for unresponsive areas on phone, tablet, or laptop touchscreens.
ImageMagick Online vs Task-Specific Tools - Which to Pick - Routing guide for readers searching "imagemagick online": when to open ImageMagick Online and when a task-specific tool (Crop, Resize, Compress, HEIC to JPG) i...
In-Browser Image Tools - Lessons Learned - What we learned running free in-browser image tools for 100K monthly users - technical choices, usage patterns, and what surprised us.
Is This Long Number a Timestamp? Milliseconds vs Seconds - A pasted 10-, 13-, 16-, or 19-digit number can be Unix seconds, milliseconds, microseconds, nanoseconds, or just an ID - here's how to tell quickly.
Keyboard Test Keys Not Detected: 4 Fixes - Keyboard test shows some keys don't highlight?
Milliseconds to date: UTC vs local time, why it can look off - Milliseconds to date conversion: UTC vs local time, why your result may be hours off, and how to verify which value is correct.
PNG to SVG - when to vectorize a raster image - PNG to SVG online - auto-traces raster pixels into vector paths.
Screen Test for Laptop - 5-Minute Checklist - Five quick screen checks for a laptop you just bought or are about to return - dead pixels, brightness on battery vs AC, IPS shift, glare, scaling.
Screen test online vs app: which is more accurate? - Browser screen tests catch panel defects (dead pixels, uniformity, bleed) in two minutes.
Screen test vs camera test - which one do you actually need? - Stuck pixels or backlight bleed: screen test.
Screen Test vs LCD Test - Same Thing? - Screen test, display test, monitor test - they all mean the same checks.
Webcam Mirror vs Flip Explained: Why Your Camera Preview Reverses Text - Why your webcam preview reverses text and the saved video usually does not.

Site resources

Editorial, contact, and policy pages.

Last updated: Apr 30, 2026