Candid Tools
Candid Tools

125 tools · free forever · no BS

Tools that don't phone home.

Free tools for PDFs, images, audio and more that run entirely in your browser - the files you add are never uploaded.

Derivative ExplorerDerivative ↔ Integral ExplorerSolids of RevolutionWeighting LensConvolution MachineAI Cost CalculatorInvoice GeneratorAge CalculatorSchema Markup CheckerRedirect CheckerSERP Snippet PreviewUTM Link BuilderColor BrushResize ImageJSON FormatterJWT DecoderRegex TesterFile Hash CheckerPDF MergerPDF to CSVRotate PDFWatermark PDFCrop PDFProtect PDFRemove PDF PasswordSmooth DrawCode SnippetHEIC to PNGWebP to JPGTranscribe AudioWebcam TestRemove Background NoisePDF to AudioTodo ListAWS Edge LocationsImage CompressorHandwritten NoteCron CheckerQR Code ReaderCompress PDFWord & Character CounterStrip EXIFP2P File ShareJPG to PDFPDF to WordPDF to PNGAcapella ExtractorChange Song Key & TempoLyrics to LRCCompress VideoTrim AudioMake Audio LouderFade In & OutRemove SilenceSplit AudioBlur Faces in VideoObject & Text RemoverBlur FacesImage to Text (OCR)Sign PDFOCR PDFPDF to HandwritingFill PDF Form
Integral ExplorerTaylor Series AnimatorGradient Descent PlaygroundLaplace System BuilderGuess the ResponseAI Model ID LookupAI Model PlaygroundDomain InfoLink Preview CheckerSitemap Validator & GeneratorAlt Text GeneratorBlur BrushRotate ImageCrop ImageBase64 DecoderMarkdown Live PreviewDe-identify TextLinkedIn Image EditorSplit PDFReorder PDF PagesAdd PDF Page NumbersPDF to JPGHighlight PDFExtract PDF PagesDraw ArrowCSV PreviewImage ConverterPNG to JPGMP4 to MP3Microphone TestVoice RecorderText to SpeechVoice / Music SplitterFlip ImageGPU & CPU InfoImage CompareGradient BackgroundQR Code GeneratorPassword GeneratorJSON & Text DiffLorem Ipsum GeneratorBefore You Post - Photo Privacy CheckFit to SendWord to PDFHEIC to JPGRemove VocalsBPM & Key FinderStem SplitterVideo to TextTrim VideoMerge AudioLoudness NormalizerSlowed + ReverbStereo to MonoVideo to GIFBackground RemoverAI Image UpscalerPassport Photo MakerEdit PDF TextRedact PDFTranslate PDFPDF Slides to Anki

Images

Blur Brush

Interactive tool to selectively blur parts of images for privacy

Color Brush

Pick a color from an image with an eyedropper, then brush it onto other areas to touch up or cover details

Rotate Image

Rotate images in 90° increments

Resize Image

Resize an image to exact width and height

Crop Image

Crop an image to a selection you draw

LinkedIn Image Editor

Create a LinkedIn profile image with custom text overlay

Draw Arrow

Draw arrows on images

Smooth Draw

Sketch with smooth ink; rough circles, boxes and arrows snap to clean shapes

Image Converter

Convert one or many images, including HEIC iPhone photos, to JPG, PNG, WebP, or AVIF in your browser

HEIC to PNG

Convert HEIC/HEIF iPhone photos to PNG

PNG to JPG

Convert PNG images to smaller JPG files

WebP to JPG

Convert WebP images to JPG for apps that can't open WebP

Flip Image

Flip images horizontally or vertically, supporting SVG files

Image Compressor

Compress (condense) images while maintaining dimensions with customizable quality

Image Compare

Upload two images and create side-by-side comparison for social media

Handwritten Note

Turn typed text into a handwritten-style note image, with your choice of font and colors

Gradient Background

Add a gradient background and white caption text below your image

Strip EXIF

Remove EXIF metadata - including GPS location - from a photo before you share it

Before You Post - Photo Privacy CheckAI

Find location data, faces, card numbers, emails and API keys in a photo or screenshot, then clean it in one click

HEIC to JPG

Convert HEIC/HEIF iPhone photos to JPG

Background RemoverAI

Cut the background out of a photo with in-browser AI

Object & Text RemoverAI

Brush over objects, people or text and AI fills the gap

AI Image UpscalerAI

Upscale a photo 2x or 4x with in-browser AI, sharper than a resize

Blur FacesAI

Detect and blur every face in a photo automatically

Passport Photo MakerAI

Make passport and ID photos at the right size for your country

PDFs

PDF Merger

Merge multiple PDF files

Split PDF

Split a PDF into multiple files by page number

PDF to CSV

Extract a table from a text-based PDF into a CSV file, best-effort

Reorder PDF Pages

Reorder the pages of a PDF by thumbnail, then export

Rotate PDF

Rotate every page of a PDF in 90° increments

Add PDF Page Numbers

Add page numbers to the bottom of every page in a PDF

Watermark PDF

Stamp a diagonal text watermark across every page of a PDF

PDF to JPG

Convert every page of a PDF into a JPG image

Crop PDF

Crop every page of a PDF to a selection you draw

Highlight PDF

Highlight text in a PDF in yellow, green, blue or pink, or box areas on scanned pages

Protect PDF

Add a password to a PDF with AES-256 encryption

Extract PDF Pages

Extract specific pages from a PDF file

Remove PDF Password

Unlock a password-protected PDF file

PDF to AudioAI

Turn a PDF into an audiobook: listen or download an MP3

Compress PDF

Shrink a large PDF's file size for easier sharing

JPG to PDF

Combine JPG, PNG and other images into one PDF

Word to PDF

Convert DOCX, DOC, ODT and RTF documents to PDF

PDF to Word

Turn a PDF into an editable Word (DOCX) document

PDF to PNG

Turn each PDF page into a lossless PNG image

Edit PDF Text

Click any text in a PDF and change it, in the same font

Sign PDF

Draw, type or upload a signature and place it on a PDF

Redact PDF

Permanently remove text and areas from a PDF

OCR PDFAI

Make a scanned PDF searchable and selectable with OCR

Translate PDFAI

Translate a PDF's text on-device with Chrome's translator

PDF to Handwriting

Turn a PDF or typed text into handwritten-looking notes, on its own layout or notebook paper

PDF Slides to Anki

Turn lecture slides into an Anki deck with slide images

Fill PDF Form

Fill in PDF form fields and save the completed form

Audio & Video

MP4 to MP3

Extract the audio from a video as MP3, M4A or WAV, in your browser

Transcribe AudioAI

Turn speech into text with timestamps, in your browser

Microphone Test

Check your mic with a live level meter and a 5-second playback

Webcam Test

Check your camera's real resolution, frame rate and picture

Voice Recorder

Record from your microphone and download it, or transcribe it

Remove Background NoiseAI

Clean up a noisy voice recording without uploading it

Text to SpeechAI

Read any length of text aloud with natural voices, as MP3 or WAV

Voice / Music SplitterAI

Separate a voice track from background music in your browser

Remove VocalsAI

Make a karaoke or instrumental version of any song

Acapella ExtractorAI

Get the vocals (acapella) from any song with AI

BPM & Key Finder

Find a song's tempo and musical key, with Camelot codes

Change Song Key & Tempo

Move a song to a new key or speed, independently

Stem SplitterAI

Split a song into vocals, drums, bass and other

Lyrics to LRCAI

Make a synced .lrc lyrics file from a song

Video to TextAI

Transcribe the speech in a video to text and subtitles

Compress Video

Shrink a video to fit Discord, WhatsApp or email

Trim Video

Cut the start and end off a video, or crop it to 9:16

Trim Audio

Cut the start and end off an MP3, M4A or WAV, losslessly

Merge Audio

Join MP3, M4A or WAV files into one, losslessly when they match

Make Audio Louder

Boost the volume of an MP3, M4A or WAV without clipping

Loudness Normalizer

Measure LUFS and normalize to podcast, Spotify or ACX levels

Fade In & Out

Add a smooth fade-in and fade-out to an audio file

Slowed + Reverb

Make a slowed + reverb, sped up or nightcore version of a song

Remove Silence

Cut long pauses out of a recording, with a preview of every cut

Stereo to Mono

Mix stereo to mono or keep one side, and fix one-ear audio

Split Audio

Split audio into parts by count, length, silences or times

Video to GIF

Turn a clip from a video into a GIF or animated WebP

Blur Faces in VideoAI

Find, track and blur every face in a video automatically

0 bytes

Runs in your browser

Client-side tools process files locally - nothing is uploaded to a server.

0 sign-ups

No account, no wait

Open a tool and use it immediately. No sign-up flow between you and the task.

1 developer

Built by one developer

No VC roadmap, no growth team - just tools built to solve real, everyday problems.

Why "No BS"

 Most free toolsCandid Tools
Account requiredUsuallyNever
File ever leaves your browserOftenNo - client-side only
Price after a free tierHidden, then a paywallFree tools stay free, forever
Ads / tracking on the tool pageCommonNone

Frequently asked questions

Is Candid Tools actually free, or is there a paid tier?

Free, full stop. No premium tier, no feature paywall, no usage limit that unlocks with a card number.

Do I need to create an account?

No. Open any tool and use it immediately - there's no sign-up flow between you and the task.

What happens to the files or text I use in a tool?

For nearly every tool, processing runs entirely in your browser - nothing is uploaded to a server. The exceptions are the tools that have to reach the internet for you: Domain Info, Schema Markup Checker, Link Preview Checker, Redirect Checker and Sitemap Validator & Generator. They send the domain or URL you enter (never a file) to our server, which looks it up or downloads that page and doesn't store it. Each one says so on the tool itself, and where one also lets you paste code or upload a file, that part stays in your browser.

How is this different from other free online tools?

Most "free" tools upload your file to a server, process it there, and send it back - and often gate real usage behind an account or a paywall once you're hooked. Everything here that can run client-side does, and the free tools stay free.

If it's free, what's the catch - how do you make money?

There isn't a hidden catch on the tools themselves. The site runs on lightweight product analytics (PostHog) to see what's useful, plus an advertising pixel while a campaign is running - the privacy page says which of those is live right now.

Can I request a tool that doesn't exist yet?

Yes - email hello@candidtools.com. Tools get added because they're useful, not because they tested well with a growth team.

Have a tool in mind, or something not working?

If there's a tool you keep wishing existed, or you hit a bug, tell me and I'll look at it.